6. A 25hp 600v 3 phase synchronous motor is unable to start with the proper size of time delay fuse. What is the maximum allowable size fuse that can be used? a. 40A b. 90A c. 70A d. 100A 7. What is the minimum trade size of conduit if R90 copper conductor is required to supply a 575v 3 phase SCIM with an insulation class of B and FLA of 82A? a. 27 b. 35 C. 41 d. 53 8. What is the minimum allowable size of R90 copper conductor for use to supply the secondary resistors of a 575v 3 phase 50hp class B insulation rating wound rotor motor? a. #10 b. #8 c. #6 d. #4 9. A motor nameplate states the following: 600v 3 phase 40hp SF 1.17, FLA 35A, Ins B, what conductor size would be used to supply the motor? a. #10 b. #6 C. #4 d. #8 incly for ?
Answers
The maximum allowable size fuse for a 25hp 600V 3-phase synchronous motor that is unable to start with the proper size of time delay fuse would be 90A.
This is based on the general guideline of selecting a fuse size that is 250% of the motor's full load current (FLA). For a 25hp motor with a voltage of 600V and an FLA of approximately 35A, the calculated fuse size would be 87.5A. However, since fuse sizes are standardized, the next available size would be chosen, which is 90A. The minimum trade size of conduit required to supply a 575V 3-phase squirrel cage induction motor (SCIM) with an insulation class of B and a full load current (FLA) of 82A using an R90 copper conductor would be 41.
The minimum trade size of the conduit is determined based on the National Electrical Code (NEC) requirements, taking into account the size and number of conductors. In this case, with a high FLA and the need for an R90 copper conductor, a larger conduit size is necessary to accommodate the conductors and ensure proper installation and performance. The minimum allowable size of R90 copper conductor required to supply the secondary resistors of a 575V 3-phase 50hp wound rotor motor with a class B insulation rating would be #4. The conductor size is determined based on the motor's current rating, insulation class, and voltage. In this case, with a 50hp motor and a class B insulation rating, a minimum #4 R90 copper conductor would be necessary to handle the current flow and meet safety and performance requirements.
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Related Questions
The UHRS platform is optimized for Edge/Internet Explorer only. You can still use your favorite browser, but keep in mind that you may experience technical issues when working on UHRS with a different browser than Edge or Internet Explorer.
UHRS is optimized for...
Answers
It is to be noted that all UHRS platforms are optimized for the popular kinds of internet browser applications.
What is a UHRS?The Universal Human Relevance System (UHRS) is a crowdsourcing platform that allows for data labeling for a variety of AI application situations.
Vendor partners link people referred to as "judges" to offer data labeling at scale for us. All UHRS judges are bound by an NDA, ensuring that data is kept protected.
A browser is a software tool that allows you to see and interact with all of the knowledgeon the World Wide Web. Web sites, movies, and photos are all examples of this.
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The velocity field of a flow is given by V = 2x2 ti +[4y(t - 1) + 2x2 t]j m/s, where x and y are in meters and t is in seconds. For fluid particles on the x-axis, determine the speed and direction of flow
Answers
Answer:
Explanation:
The value of a will be zero as it is provided that the particle is on the x-axis.
Calculate the velocity of particles along x-axis.
\({\bf{V}} = 2{x^2}t{\bf{\hat i}} + [4y(t - 1) + 2{x^2}t]{\bf{\hat j}}{\rm{ m/s}}\)
Substitute 0 for y.
\(\begin{array}{c}\\{\bf{V}} = 2{x^2}t{\bf{\hat i}} + \left( {4\left( 0 \right)\left( {t - 1} \right) + 2{x^2}t} \right){\bf{\hat j}}{\rm{ m/s}}\\\\ = 2{x^2}t{\bf{\hat i}} + 2{x^2}t{\bf{\hat j}}{\rm{ m/s}}\\\end{array}\)
Here,
\(A = 2{x^2}t \ \ and\ \ B = 2{x^2}t\)
Calculate the magnitude of vector V .
\(.\left| {\bf{V}} \right| = \sqrt {{A^2} + {B^2}}\)
Substitute
\(2{x^2}t \ \ for\ A\ and\ 2{x^2}t \ \ for \ B.\)
\(\begin{array}{c}\\\left| {\bf{V}} \right| = \sqrt {{{\left( {2{x^2}t} \right)}^2} + {{\left( {2{x^2}t} \right)}^2}} \\\\ = \left( {2\sqrt 2 } \right){x^2}t\\\end{array}\)
The velocity of the fluid particles on the x-axis is \(\left( {2\sqrt 2 } \right){x^2}t{\rm{ m/s}}\)
Calculate the direction of flow.
\(\theta = {\tan ^{ - 1}}\left( {\frac{B}{A}} )\)
Here, θ is the flow from positive x-axis in a counterclockwise direction.
Substitute \(2{x^2}t\) as A and \(2{x^2}t\) as B.
\(\begin{array}{c}\\\theta = {\tan ^{ - 1}}\left( {\frac{{2{x^2}t}}{{2{x^2}t}}} \right)\\\\ = {\tan ^{ - 1}}\left( 1 \right)\\\\ = 45^\circ \\\end{array}\)
The direction of flow is \(45^\circ\) from the positive x-axis.
What is the Bernoulli formula?
Answers
Answer:
P1+1/2pv2/1+pgh1=P2+1/2pv2/2+pgh2
Give an example of one technology that is well matched to the needs of the environment, and one technology that is not.
Answers
Answer:
oh god... i have no idea lm.ao
Explanation:
Q.3Set. (C) 1000 hours of Testing of a sensor reveals the following data. Two samples out of twenty sensors failed after 900 and 800 hours respectively and balance 18 samples worked fine even after 1000 hours of testing. The customer specified reliability of 0.95How many hours of operation of sensors can be guaranteed based on above data.
Answers
Answer:
The ACT Science test explained below begins on page 40 of the guide. Please note that the 2020-2021 guide features the same practice test
Explanation:
Which of the following is false about most machine learning models?
They require numbers or collections of numbers as input.
They are flexible enough to handle all issues you might see in your dataset (lack of data, incorrect data, etc)
They are trained by iteratively adjusting their parameters to minimize a loss function.
Once trained, their model parameters can be used to make new predictions in a process called a “model inference algorithm.”
Answers
The false statement about most machine learning models is that: B. they are flexible enough to handle all issues you might see in your dataset (lack of data, incorrect data, etc).
What is machine learning?Machine learning (ML) is also referred to as deep learning or artificial intelligence (AI) and it can be defined as a subfield in computer science which is typically focused on the use of data-driven techniques (methods), computer algorithms, and technologies to develop a smart computer-controlled robot with an ability to automatically perform and manage tasks that are exclusively meant for humans or solved by using human intelligence.
Generally speaking, machine learning models are designed and developed to accept numerical data (numbers) or collections of numerical data (numbers) as an input.
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An elevation is.... * 10 points a. A detailed description of requirements, composition and materials for a proposed building. b. A view of a building seen from one side, a flat representation of one façade. This is the most common view used to describe the external appearance of a building. c. The development of the last remaining lots in an existing developed area, the new development within an area already served by existing infrastructure and services, or the reuse of already developed, but vacant properties. d. The practice of creating structures and using processes that are environmentally responsible and resource-efficient throughout a building's life-cycle from siting to design, construction, operation, maintenance, renovation and deconstruction.
Answers
Answer:
b. A view of a building seen from one side, a flat representation of one façade. This is the most common view used to describe the external appearance of a building.
Explanation:
An elevation is a three-dimensional, orthographic, architectural projection that reveals just a side of the building. It is represented with diagrams and shadows are used to create the effect of a three-dimensional image.
It reveals the position of the building from ground-depth and only the outer parts of the structure are illustrated. Elevations, building plans, and section drawings are always drawn together by the architects.
FILL IN THE BLANK the term ____ describes the ratio of data size in bits or bytes before and after compression.
Answers
The term compression ratio describes the ratio of data size in bits or bytes before and after compression.
Compression ratio is a measure used to quantify the effectiveness of a compression algorithm in reducing the size of data. It represents the ratio of the original data size to the compressed data size. A higher compression ratio indicates that more data has been compressed and the resulting file size is smaller.
Compression techniques are commonly used to reduce file sizes for storage or transmission purposes. Various compression algorithms, such as ZIP, gzip, and JPEG, employ different methods to eliminate redundant or unnecessary data, resulting in a compressed version of the original file.
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The man and his bicycle together weigh 200 lb. What power P is the man developing in riding Spercent grade at a constant speed of 15 mi /hr?
Answers
The man is developing approximately 0.57 horsepower while riding uphill at 5% grade and constant speed of 15 mi/hr.
To calculate the power P that the man is developing while riding uphill at Spercent grade and constant speed of 15 mi/hr, we can use the formula:
P = (F + mg) * v
Where F is the force exerted by the man on the pedals, m is the mass of the man and the bicycle (200 lb), g is the acceleration due to gravity (32.2 ft/s^2), and v is the velocity of the bicycle (15 mi/hr or 22 ft/s).
To determine F, we need to first calculate the total force required to overcome the uphill slope. This can be found using the following formula:
F_slope = m * g * sin(theta)
Where theta is the angle of the slope in radians. To convert Spercent grade to radians, we can use the formula:
theta = arctan(S/100)
Where S is the slope percentage. For example, if S is 5%, then theta = arctan(0.05) = 2.86 degrees or 0.05 radians.
So, for the given problem, let's assume S is 5%. Then:
theta = arctan(0.05) = 0.05 radians
F_slope = 200 * 32.2 * sin(0.05) = 33.23 lb
Now, we can calculate the power P as:
P = (F + mg) * v = (F_slope + 200 * g) * v
Substituting the values, we get:
P = (33.23 + 200 * 32.2) * 22 = 14984.4 ft-lb/s or 0.57 hp
Therefore, the man is developing approximately 0.57 horsepower while riding uphill at 5% grade and constant speed of 15 mi/hr.
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how to make alloy circle c
Answers
To make an alloy circle C, you need to first prepare the material by combining two or more metals together. This can be done by heating the metals until they liquify and then mixing them together. Once the alloy is formed, it can be shaped into a circle by using a die-casting machine or other casting methods. After the circle is shaped, it can be further processed to create the desired finish.
To make an alloy circle C, you will need to follow the steps below:
1. Gather the metals you want to use to make the alloy. Commonly used metals include copper, zinc, and tin.
2. Melt the metals together in a crucible or furnace at a high temperature.
3. Once the metals are melted and combined, pour the molten alloy into a mold in the shape of a circle.
4. Allow the alloy to cool and solidify in the mold.
5. Once the alloy is solid, remove it from the mold and you will have an alloy circle C.
It is important to note that different metals have different melting points and will require different temperatures to melt and combine. Additionally, the proportions of each metal used will affect the properties of the final alloy.
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What does Enter key do?
You cannot click Enter key to start a line if your current is blank?
This is spot to do today
Answers
Answer:
See below
Explanation:
Enter-key also called the "Return key," it is the keyboard key that is pressed to signal the computer to input the line of data or the command that has just been typed.It Was the Return KeyThe Enter key was originally the "Return key" on a typewriter, which caused the carriage to return to the beginning of the next line on the paper. In a word processing or text editing application, pressing Enter ends a paragraph. A character code for return/end-of-line, which is different in Windows than it is in the Mac, Linux or Unix, is inserted into the text at that point.
Answer:
True
Explanation:
Once there are two yellow lines having inner broken lines on the two sides of a center traffic lane, what this is trying to tell you is that you can use those lanes to start a left hand turn, or a U-turn from the both directions of traffic. However you cannot use it for passing. This is sometimes misunderstood by road users and drivers.
A restaurant and dairy are participating in a community digester pilot program within the UMD Industrial Park. The following waste stocks are currently treated in the anaerobic digester: waste cooking oil, glass clippings, and cow manure. There is 200 gallons of waste cooking oil delivered per week, six 50 gallons barrels of glass clippings per week, and 500 Liters of cow manure per day. The feedstocks have the following VS concentrations and methane production potentials:________.
Waste cooking oil: 25,000 mg/L VS; 600 L CH4/g VS Grass Clippings: 15,000 mg/L VS; 300 L CH4/g VS Cow Manure: 5,000 mg/L VS; 150 L CH4/g VS
What is the daily methane production in Liters?
Answers
Answer:
2727000 Liters
Explanation:
Determine the daily methane production in liters
For waste cooking oil ;
Delivered amount in liters = 757.082 liters per week
daily = 757.082 / 7 = 108.154 L/day
waste vs concentration = 25,000 mg/L
Its volatile solid = 25000 * 10^-3 (g/l) * 108.154 L/day
= 2703.864 g/day
hence methane production in liters
= 600 L/g * 2703.864 g/day
= 1622318.57 L
For cow manure
Delivered amount in liters = 500 liters / day
Vs concentration = 5000 mg/l
Hence amount of Vs = 5000 * 10^-3 * 500 = 2500 ( g/day)
methane production in liters
= 150 * 2500 = 375000 liters
For glass clippings
Delivered amount in liters per day = 1135.62 / 7 = 162.23 L/day
amount of Vs = 15000 * 10^-3 (g/L) * 162.23 L/day = 2438.45 ( g/day )
hence the methane production in liters
= 300 * 2433.45 = 730035 L
Hence ∑ daily methane production of each waste
= 1622318.57 + 375000 + 730035 = 2727000 Liters
For Figure Below, if the elevation of the benchmark A is 25.00 m above MSL:
1. Using the Rise and Fall Method, find the reduced level for all points. (Construct the Table)
2. Using HPC Method, find the reduced level for all points. ( Construct the Table).
3. Show all required Arithmetic checks for your work. For Item 1 and 2.
4. What is the difference in height between points H and D?
5. What is the gradient of the line connecting A and J, knowing that horizontal distance = 200
m.
Answers
Answer:
For Figure Below, if the elevation of the benchmark A is 25.00 m above MSL:
1. Using the Rise and Fall Method, find the reduced level for all points. (Construct the Table)
2. Using HPC Method, find the reduced level for all points. ( Construct the Table).
3. Show all required Arithmetic checks for your work. For Item 1 and 2.
4. What is the difference in height between points H and D?
5. What is the gradient of the line connecting A and J, knowing that horizontal distance = 200
m.
An ADC employing a 1000-level quantizer is used to convert an analogue signal that with bandwidth 20 kHz to binary format. Determine the minimum bit rate from this ADC.
Answers
To determine the minimum bit rate of an ADC (Analog-to-Digital Converter) with a 1000-level quantizer and a bandwidth of 20 kHz, the minimum bit rate from this ADC is 400 kHz.
In this case, the signal has a bandwidth of 20 kHz, so the minimum sampling rate required is 2 times the bandwidth, which is 2 * 20 kHz = 40 kHz. The minimum sampling rate corresponds to the minimum bit rate.
To convert an analogue signal with a 20 kHz bandwidth to a binary format using a 1000-level quantizer, each level of the quantizer requires a certain number of bits. Since there are 1000 levels, we need at least log2(1000) bits to represent each level. Rounded up to the nearest integer, log2(1000) is 10.
Therefore, the minimum bit rate of the ADC is the product of the minimum sampling rate and the number of bits per sample:
Minimum bit rate = Minimum sampling rate * Number of bits per sample
= 40 kHz * 10 bits
= 400 kHz
Hence, the minimum bit rate from this ADC is 400 kHz.
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An aluminum bar 125 mm long with a square cross section 16 mm on an edge is pulled in tension with a load of 66,700 N and experiences an elongation of 0.43 mm. Assuming that the deformation is entirely elastic, calculate the modulus of elasticity of the aluminum. (Please leave a space between the number and the unit, and use correct capitalization and lower case for units - for example: MPa, not Mpa.)
Answers
Answer: the modulus of elasticity of the aluminum is 75740.37 MPa
Explanation:
Given that;
Length of Aluminum bar L = 125 mm
square cross section s = 16 mm
so area of cross section of the aluminum bar is;
A = s² = 16² = 256 mm²
Tensile load acting the bar p = 66,700 N
elongation produced Δ = 0.43
so
Δ = PL / AE
we substitute
0.43 = (66,700 × 125) / (256 × E)
0.43(256 × E) = (66,700 × 125)
110.08E = 8337500
E = 8337500 / 110.08
E = 75740.37 MPa
Therefore, the modulus of elasticity of the aluminum is 75740.37 MPa
which of the following functions calculate the amount used to repay the principal of a loan? select all options that apply
a. PPMT
b. CUMIPMT
c. IPMT
d. CUMPRINC
Answers
CUMPRINC function calculates the amount used to repay the principal of a loan.
What is a loan?A loan is a kind of credit arrangement in which a certain amount of money is given to another party in return for the value or principal amount being repaid in the future. The lender will frequently increase the principal amount by adding interest or finance charges, which the borrower must pay in addition to the principal balance.
In addition to being available as an open-ended line of credit up to a predetermined limit, loans can be for a specific, one-time sum. Secured, unsecured, commercial, and personal loans are just a few of the many different types of loans available.
One type of debt that a person or other entity may incur is a loan. A sum of money is advanced to the borrower by the lender, which is typically a business, financial institution, or government.
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in a photovoltaic solar power plant, what is the purpose of the inverter?
Answers
In a photovoltaic solar power plant the purpose of the inverter is that the inverter converts direct current power to alternating current
So, basically, the solar panels which are fitted in the solar power plant create direct current, but the main problem with direct current is that we cannot use it directly in our homes or for our business purposes
Hence the inverter converts these direct currents to alternating currents which we can use in our homes and these alternating currents can also be used in the electrical grid
Besides, that inverter can also help in maximizing the power output, so that the modules and the solar panels can work at an efficient rate
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Identify two typical construction tasks and produce a task analysis, completed to an appropriate industry acceptable format. This is to show hazards, risks, and resultant risks once you have implemented appropriate control measures.
Identify potentially harzadous waste material used on a typical construction site.
Answers
Explanation:
Task 1: Pouring Concrete Slab Task Analysis:
Step 1: Site Preparation
Hazard: Uneven terrain, buried utilities, and potential environmental hazards.
Risk: Trips, falls, cuts, electrocution, and hazardous material exposure.
Control Measures: Conduct site survey, obtain site plans, mark utility lines, and provide appropriate personal protective equipment (PPE).
Step 2: Formwork Installation
Hazard: Heavy lifting, repetitive motion, and potential structural instability.
Risk: Back strain, muscle fatigue, and collapse.
Control Measures: Provide mechanical lifting equipment, design stable formwork systems, and provide appropriate PPE.
Step 3: Reinforcement Placement
Hazard: Sharp and heavy objects, repetitive motion, and potential structural instability.
Risk: Lacerations, impalement, muscle fatigue, and collapse.
Control Measures: Provide appropriate PPE, design safe lifting and placement systems, and ensure proper bracing of reinforcement.
Step 4: Concrete Mixing and Pouring
Hazard: Dust exposure, heavy equipment operation, and chemical exposure.
Risk: Respiratory problems, collision, and chemical burns.
Control Measures: Provide adequate ventilation, use personal protective equipment, ensure equipment is in good condition, and follow manufacturer’s instructions.
Step 5: Finishing and Curing
Hazard: Dust exposure, repetitive motion, and chemical exposure.
Risk: Respiratory problems, muscle fatigue, and chemical burns.
Control Measures: Provide adequate ventilation, use personal protective equipment, follow manufacturer’s instructions for finishing and curing, and ensure proper curing time is allowed.
Task 2: Roofing Installation Task Analysis:
Step 1: Site Preparation
Hazard: Uneven terrain, potential electrical hazards, and environmental hazards.
Risk: Trips, falls, electrical shock, and hazardous material exposure.
Control Measures: Conduct site survey, obtain site plans, mark utility lines, and provide appropriate PPE.
Step 2: Roof Deck Installation
Hazard: Heavy lifting, repetitive motion, and potential structural instability.
Risk: Back strain, muscle fatigue, and collapse.
Control Measures: Provide mechanical lifting equipment, design stable roof deck systems, and provide appropriate PPE.
Step 3: Underlayment Installation
Hazard: Sharp objects, repetitive motion, and potential fall hazards.
Risk: Lacerations, muscle fatigue, and falls.
Control Measures: Provide appropriate PPE, ensure safe working conditions, and use fall protection equipment.
Step 4: Shingle Installation
Hazard: Sharp objects, repetitive motion, and potential fall hazards.
Risk: Lacerations, muscle fatigue, and falls.
Control Measures: Provide appropriate PPE, ensure safe working conditions, and use fall protection equipment.
Step 5: Roof Edge and Flashing Installation
Hazard: Sharp objects, repetitive motion, and potential fall hazards.
Risk: Lacerations, muscle fatigue, and falls.
Control Measures: Provide appropriate PPE, ensure safe working conditions, and use fall protection equipment.
Identify potentially hazardous waste material used on a typical construction site: One potentially hazardous waste material commonly used on a construction site is asbestos. Asbestos is a fibrous mineral that was widely used in construction materials for its insulating and fire-resistant properties. However, when asbestos-containing materials are damaged or disturbed, asbestos fibers can be released into the air and inhaled, leading to serious health risks such as lung cancer and mesothelioma. As a result, proper handling, removal, and disposal of asbestos-containing materials are critical to protecting the health and safety of workers and the environment.
The company PureNSafe is designing a portable, solar-powered disinfection system for Army use only. The system is simply an inlet pipe, a pump, a mixing chamber and an outlet pipe. The water is continuously pumped into the chamber where it is irradiated with UV light before it exits through the the appropriate tube into a collection vessel. The disinfection rate constant rate of disinfection with UV light is 7.80 s.1 and the amount of bacteria has to be reduced by 99.9%. be reduced by 99.9%. Since the Army requires an object that can be carried in a backpack, it requires that the chamber of the apparatus must not hold a capacity greater than 2 L. How much water will the system be able to produce during 10 hours of sunshine?
Answers
Solution :
The treatment system will operate as the well mixed chamber.
Disinfection rate constant for the UV light, k is 7.80 /s. Number of bacteria in water need to be reduced by 99.9%
Percent reduction of bacteria should be \($(1-10^{0.99}) \times 100 =89.7\%$\)
Volume of the unit chamber is fixed at 2L
Assume the inlet concentration, \($C_0$\) as 1000
The outlet concentration of bacteria, C should be \($1000-\left(1000 \times \frac{89.7}{100}\right)$\)
= 103
The well mixed chamber will then follow a completely mixed flow reactor model.
Compute the time required :
\($t=\frac{1}{k}\left(\frac{C_0}{C}-1\right)$\)
\($t=\frac{1}{7.8}\left(\frac{1000}{103}-1\right)$\)
= 1.115 s
Flow through the system is \($\frac{2 \ L}{1.115 \ s}$\) = 1.79 L/s
The amount of water treated during the 10 hours of sunlight is 1.79 x 10 x 60 x 60 = 64440 L
Given that. p: amaka is short and beautiful q: amaka is beautiful Write each of the following statements in symbolic form using p and q 1. Amaka is short and beautiful 2. Amaka is short but not beautiful 3. It is not true that amaka is not short or beautiful 4. Amaka is not short but beautiful 5. It is not true that amaka is not short or not beautiful
Answers
The statements in symbolic form using p and q will be:
Amaka is short and beautiful: p ∧ qAmaka is short but not beautiful: p ∧ ¬qIt is not true that Amaka is not short or beautiful: ¬(¬p ∨ ¬q) or equivalently, p ∧ qAmaka is not short but beautiful: ¬p ∧ qIt is not true that Amaka is not short or not beautiful: ¬(¬p ∨ ¬¬q) or equivalently, ¬(¬p ∨ q) or equivalently, p ∨ ¬qWhat is symbolic form of information?It should be noted that symbolic information is information that is represented by systems of symbols.
It's possible that such a system may consist of one symbol. For instance, texts form an important type of symbolic information.
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When a heater is turned on, the fuse wire repeatedly gets burnt even after changing the same fuse wire with the same length and width, the wire keeps getting burnt. Which of the following is advisable?
Answers
First, because a current greater than its capacity is being flowed through, the fuse burns out repeatedly. Now,. I and R have an inverse relationship (current). The fuse wire's length and current rating are independent. Fuse wire is capable of carrying electricity over any distance, but thickness—which regulates melting—is crucial.
Why does fuse wire burn?All of the circuit's current flows through a metal ribbon that is inside the fuse. If too much current flows through the ribbon—which is sized to fit the gauge of the circuit wire—it melts through or "blows," and the circuit is destroyed.(ii) The fuse wire's length and current rating are independent. Fuse wire is capable of carrying electricity over any distance, but thickness—which regulates melting—is crucial.If the current is too high, the element heats up to a greater temperature, melts immediately, or melts a soldered junction inside the fuse, opening the circuit and cutting off the current. Therefore, it is irrelevant how long the fuse wire is.To learn more about Fuse wire refer to:
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NEED ASAP WILL GIVE BRAINLIEST IF RIGHT
Read the following claim.
Tiera Fletcher's parents supported their daughter in her endeavors.
How would Tiera Fletcher MOST likely respond to this claim?
(A) She would agree but also point to occasions where they were a little too strict and forced her to take
certain classes.
(B) She would agree and say they supported her interests and did a lot to ensure she got into special
science programs.
(C) She would disagree but also point to some instances where they attempted to show some curiosity
about her career.
(D) She would disagree and say that they were actively trying to get her to choose another field of study
other than engineering.
Answers
Answer:
(C) She would disagree but also point to some instances where they attempted to show some curiosity about her career.
What does efficiency measure?
Answers
Answer:
Efficiency is defined as any performance that uses the fewest number of inputs to produce the greatest number of outputs. Simply put, you're efficient if you get more out of less.
Explanation:
please hurry i’ll give you 15 points
Answers
Answer:
measures, dissolves, liquid, carbon dioxide, evaporates, water vapor, mold, decompose
Consider a horizontal, thin-walled circular tube of diameter D=0. 025 m submerged in a container of n-octadecane (paraffin), which is used to store thermal energy. As hot water flows through the tube, heat is transferred to the paraffin, converting it from the solid to liquid state at the phase change temperature of T[infinity]=27. 4∘C. The latent heat of fusion and density of paraffin are hsf=244kJ/kg and rho=770kg/m3, respectively, and thermophysical properties of the water may be taken as Kcp = 4. 185 kJ/kg⋅ K,k = 0. 653 W/m⋅K, μ = 467×10−6 kg/s⋅ m μ=467×10−6 kg/s⋅m, and Pr=2. 99.
(a) Assuming the tube surface to have a uniform temperature corresponding to that of the phase change, determine the water outlet temperature and total heat transfer rate for a water flow rate of 0. 1 kg/s and an inlet temperature of 60∘C. If H=W=0. 25 m, how long would it take to completely liquefy the paraffin, from an initial state for which all the paraffin is solid and at 27. 4∘C?
(b) The liquefaction process can be accelerated by increasing the flow rate of the water. Compute and plot the heat rate and outlet temperature as a function of flow rate for 0. 1 ≤ m ≤ 0. 5 kg/s. How long would it take to melt the paraffin for m=0. 5 kg/s?
Answers
To solve this problem, we will apply the principles of heat transfer and energy conservation.
We will use the energy balance equation to determine the outlet temperature and heat transfer rate, and then calculate the time required to completely liquefy the paraffin. We will also analyze the effect of varying water flow rate on the heat rate and outlet temperature.
(a) Calculation for water flow rate of 0.1 kg/s and inlet temperature of 60°C:
Given:
Diameter of the tube (D) = 0.025 m
Length of the tube (H) = 0.25 m
Latent heat of fusion (hsf) = 244 kJ/kg
Density of paraffin (rho) = 770 kg/m^3
Thermal conductivity of water (Kcp) = 4.185 kJ/kg⋅K
Thermal conductivity of paraffin (k) = 0.653 W/m⋅K
Dynamic viscosity of water (μ) = 467×10^(-6) kg/s⋅m
Prandtl number (Pr) = 2.99
Phase change temperature (T[infinity]) = 27.4°C
Water flow rate (m) = 0.1 kg/s
Inlet water temperature = 60°C
1. Determine the outlet temperature:
The heat transfer rate is given by:
Q = m * cp * (T_in - T_out)
Since the tube surface is assumed to have a uniform temperature corresponding to the phase change temperature (T[infinity]), we can write the energy balance equation as:
Q = hsf * m
Rearranging the equation, we have:
T_in - T_out = hsf / (m * cp)
Substituting the given values, we can calculate the outlet temperature:
T_out = T_in - (hsf / (m * cp))
T_out = 60 - (244 * 10^3) / (0.1 * 4.185)
T_out ≈ 14.82°C
Therefore, the outlet temperature is approximately 14.82°C.
2. Determine the total heat transfer rate:
The total heat transfer rate is given by:
Q_total = Q * A
Since the tube is thin-walled and horizontal, we can approximate the heat transfer area as the product of the tube circumference and length:
A = π * D * H
Substituting the given values, we can calculate the total heat transfer rate:
Q_total = Q * (π * D * H)
Q_total = (hsf * m) * (π * D * H)
3. Calculate the time required to completely liquefy the paraffin:
The time required to completely liquefy the paraffin can be calculated using the equation:
Time = (Mass of paraffin) / (Water flow rate)
The mass of paraffin can be determined using its density and the volume of the paraffin, which is equal to the product of the tube cross-sectional area and the length of the tube:
Mass of paraffin = Density of paraffin * (π * (D/2)^2 * H)
Substituting the given values, we can calculate the time:
Time = (Density of paraffin * (π * (D/2)^2 * H)) / (Water flow rate)
(b) Calculation for varying water flow rate from 0.1 kg/s to 0.5 kg/s:
We can repeat the calculations described above for different water flow rates within the given range. By plotting the heat rate (Q_total) and outlet temperature (T_out) as functions of the water flow rate (m), we can visualize their variations.
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A simple ideal Rankine cycle with water as the working fluid operates between the pressure limits of 3 MPa in the boiler and 30 kPa in the condenser. If the quality at the exit of the turbine cannot be less than 82 percent, what is the maximum thermal efficiency this cycle can have
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The Boeing 787 Dreamliner is billed to be 20% more fuel efficient than the comparable Boeing 767 and will fly at Mach 0.85. The midsize Boeing 767 has a range of 12,000 km, a fuel capacity of 90,000 L, and flies at Mach 0.80. For Boeing 787, assume the speed of sound is 700 mph and calculate the projected volumetric flow rate of fuel for each of the two Dreamliner engines in m3/s.
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Answer:
the projected volumetric flow rate of fuel for each of the two Dreamliner engines is 0.005 m³/s
Explanation:
Given the data in the question;
First we determine the fuel economy of Boeing 767
Range = 12,000 km
fuel capacity = 90,000 L
so, fuel economy of Boeing 767 will be
η\(_f\) = Range / fuel capacity
η\(_f\) = ( 12,000 km / 90000 L ) ( 1000m / 1 km) ( 3.7854 L/gal × 264.2 gal/m² )
η\(_f\) = 133,347.024 m/m³
Now, Boeing 787 is 20% more fuel efficient than Boeing 767
so fuel economy of Boeing 787 will be;
⇒ (1 - 20%) × fuel economy of Boeing 767
⇒ (1 - 0.2) × 133,347.024 m/m³
⇒ 0.8 × 133,347.024 m/m³
⇒ 106,677.6 m/m³
Hence, fuel economy of Boeing 787 dream line engine is
⇒ 106,677.6 m/m³ / 2 = 53,338.8 m/m³
Next, we find the velocity of Boeing 787
\(V_{787\) = Mach number of 787 × speed of sound
given that; Mach number is 0.85 and speed of sound is 700 mph
we substitute
\(V_{787\) = (0.85 × 700 mph) × ( 1 hr / 3600 s ) × ( 1609 m / 1 mile )
\(V_{787\) = 265.9319 m/s
Now, to get the Volume flow rate for each dream liner engine { Boeing 787 };
Volumetric flow rate = velocity of flight / fuel economy
we substitute
= 265.9319 m/s / 53,338.8 m/m³
= 0.0049857 ≈ 0.005 m³/s
Therefore, the projected volumetric flow rate of fuel for each of the two Dreamliner engines is 0.005 m³/s
Your job is to perform the steps of MapReduce to calculate a count of the number of squares, stars, circles, hearts and triangles in a dataset.Step 0: Store the dataset across 4 partitions in HDFS.
Note: we have already done one partition for you. Hint: Balance the load, but there is more than on possible "correct" partitioning.
Step 1: Map the data.
Hint: Mapping involves clustering like keys together. Show this in the visual placement of keys within a partition.
Step 2: Sort and Shuffle.
Note: as mentioned in lecture, you don't have to use the same number of nodes in this step as you did before. Let's use three instead. Hint: Balance the load.
Step 3: Reduce to calculate the final counts.
Hint: Fill in the blank lines to finalize the key-value pairs
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Answer:
Explanation:
Step 0: Store the dataset across 4 partitions in HDFS.
Partition 1 (already done):
- Partition 1 contains a subset of the dataset.
Partition 2:
- Partition 2 contains another subset of the dataset, balancing the load across the partitions.
Partition 3:
- Partition 3 holds a portion of the dataset to distribute the data evenly.
Partition 4:
- Partition 4 stores the remaining part of the dataset, ensuring load balance across all partitions.
Step 1: Map the data.
In this step, we cluster similar keys together within each partition.
Partition 1:
- Map function clusters keys: squares, stars, circles, hearts, triangles.
Partition 2:
- Map function clusters keys: squares, stars, circles, hearts, triangles.
Partition 3:
- Map function clusters keys: squares, stars, circles, hearts, triangles.
Partition 4:
- Map function clusters keys: squares, stars, circles, hearts, triangles.
Step 2: Sort and Shuffle.
In this step, we sort and shuffle the data across three nodes while maintaining load balance.
Node 1:
- Receives and processes data from Partition 1, Partition 2, and Partition 3.
Node 2:
- Receives and processes data from Partition 1, Partition 2, and Partition 4.
Node 3:
- Receives and processes data from Partition 3 and Partition 4.
Step 3: Reduce to calculate the final counts.
In this step, we perform the final reduction to calculate the counts for each key.
Node 1:
- Reduce function calculates the count of squares: count_squares = _____.
- Reduce function calculates the count of stars: count_stars = _____.
Node 2:
- Reduce function calculates the count of circles: count_circles = _____.
- Reduce function calculates the count of hearts: count_hearts = _____.
Node 3:
- Reduce function calculates the count of triangles: count_triangles = _____.
By following these steps of MapReduce, we can calculate the final counts for squares, stars, circles, hearts, and triangles in the dataset.
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Using the data presented in Fig. 7-5 (to determine the peak/mean ratio with respect to the volume), estimate the size of a container to be used with a gravity chute for a 24-story apartment building with 192 individual living units if the container will be emptied daily. Assume that the average occupancy rate for each living unit is 3.1 persons.
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The answer is given below.
Describe Volume ?In general, a volume refers to the amount of space that an object takes up. In the context of computing, specifically data storage, a volume refers to a logical partition or container that is used to store and organize data on a storage device, such as a hard drive or a flash drive.
Volumes can be created and managed by the operating system or by a storage management software, and they can be formatted with a file system that allows the user to access and manage the stored data. Volumes can be of different sizes and can be allocated to different applications or users.
In cloud computing, a volume refers to a virtual storage device that is allocated to a cloud server instance. This allows the server to store and access data independent of the underlying hardware, and enables the user to scale storage capacity up or down as needed.
Volumes can be used for a variety of purposes, including storing data backups, hosting databases, and serving as a file system for an operating system. Overall, volumes are a key component of data storage and management in modern computing.
Assuming a typical peak/mean ratio of 1.5, we can estimate the size of the container required for a 24-story apartment building with 192 individual living units.
Assuming an average occupancy rate of 3.1 persons per living unit, the total number of people in the building would be:
192 living units * 3.1 persons per living unit = 595.2 people
Assuming that each person generates 4.5 pounds of waste per day, the total amount of waste generated by the building would be:
595.2 people * 4.5 pounds of waste per person per day = 2678.4 pounds of waste per day
Assuming that the container needs to be emptied daily, the size of the container required can be estimated using the following formula:
Container volume = Waste volume per day * Peak/mean ratio
Assuming a typical peak/mean ratio of 1.5, the container volume required would be:
Container volume = 2678.4 pounds of waste per day * 1.5 = 4017.6 pounds of waste
Assuming a density of 30 pounds per cubic foot for the waste, the container volume required would be:
Container volume = 4017.6 pounds of waste / 30 pounds per cubic foot = 133.92 cubic feet
Therefore, a container with a volume of approximately 133.92 cubic feet would be required for a 24-story apartment building with 192 individual living units assuming a typical peak/mean ratio of 1.5. However, it is important to note that this estimate is based on several assumptions and the actual size of the container required may vary depending on the specific circumstances of the building.
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Volumes can be created and managed by the operating system or by a storage management software, and they can be formatted with a file system that allows the user to access and manage the stored data. Volumes can be of different sizes and can be allocated to different applications or users.
Describe Volume ?In general, a volume refers to the amount of space that an object takes up. In the context of computing, specifically data storage, a volume refers to a logical partition or container that is used to store and organize data on a storage device, such as a hard drive or a flash drive.
In cloud computing, a volume refers to a virtual storage device that is allocated to a cloud server instance. This allows the server to store and access data independent of the underlying hardware, and enables the user to scale storage capacity up or down as needed.
Volumes can be used for a variety of purposes, including storing data backups, hosting databases, and serving as a file system for an operating system. Overall, volumes are a key component of data storage and management in modern computing.
Assuming a typical peak/mean ratio of 1.5, we can estimate the size of the container required for a 24-story apartment building with 192 individual living units.
Assuming an average occupancy rate of 3.1 persons per living unit, the total number of people in the building would be:
192 living units * 3.1 persons per living unit = 595.2 people
Assuming that each person generates 4.5 pounds of waste per day, the total amount of waste generated by the building would be:
595.2 people * 4.5 pounds of waste per person per day = 2678.4 pounds of waste per day
Assuming that the container needs to be emptied daily, the size of the container required can be estimated using the following formula:
Container volume = Waste volume per day * Peak/mean ratio
Assuming a typical peak/mean ratio of 1.5, the container volume required would be:
Container volume = 2678.4 pounds of waste per day * 1.5 = 4017.6 pounds of waste
Assuming a density of 30 pounds per cubic foot for the waste, the container volume required would be:
Container volume = 4017.6 pounds of waste / 30 pounds per cubic foot = 133.92 cubic feet
Therefore, a container with a volume of approximately 133.92 cubic feet would be required for a 24-story apartment building with 192 individual living units assuming a typical peak/mean ratio of 1.5. However, it is important to note that this estimate is based on several assumptions and the actual size of the container required may vary depending on the specific circumstances of the building.
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Half-Wave Rectifier 1. In this circuit, the load is R1. Use PSpice to plot the transfer function (the resistor voltage divided by V1) of the circuit. You can use 0. 01 to 5 V range with 0. 01 V step size for your sweep. 2. Use the transfer function to sketch the output waveform (the voltage across the resistor) for a sinusoidal source, Vsin, with a peak-to-peak voltage (Vpp) of 10V and a frequency of 60Hz. 3. Run transient simulations with PSpice using the 60Hz sine wave with Vpp = 10V. Plot the output. Compare your simulation result with your sketch
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The actual PSpice software and the specific circuit configuration, it is not possible for me to generate the transfer function plot or provide a simulation result for comparison.
To perform the requested tasks related to the half-wave rectifier circuit using PSpice, a circuit simulation software, a detailed step-by-step guide is required. Unfortunately, as a text-based AI model, I am unable to execute software simulations or provide real-time graphical outputs. However, I can offer you an explanation of the general process involved in analyzing the half-wave rectifier circuit and interpreting the results.
1. **Transfer Function Plot**: The transfer function of the circuit is the ratio of the voltage across the resistor (V(R1)) to the input voltage (V1). To plot the transfer function using PSpice, you would typically set up the circuit in the software, specify the input voltage sweep range (0.01V to 5V with a step size of 0.01V), and measure the voltage across the resistor. By varying the input voltage and measuring the output voltage, you can obtain the transfer function plot.
2. **Output Waveform Sketch**: With the transfer function obtained, you can sketch the output waveform for a sinusoidal input voltage (Vsin) with specific characteristics. In this case, a sinusoidal source with a peak-to-peak voltage (Vpp) of 10V and a frequency of 60Hz is given. Using the transfer function, you can multiply the input sinusoidal waveform by the transfer function to obtain the output waveform across the resistor. Sketching this waveform would involve plotting the voltage across the resistor over time.
3. **Transient Simulation and Comparison**: To compare the simulation result with your sketch, you would run a transient simulation in PSpice using the given 60Hz sinusoidal input waveform with Vpp = 10V. This simulation would generate the output waveform of the circuit over time. You can then visually compare this simulated waveform with the sketch you made earlier.
To perform these tasks accurately and precisely, it is recommended to use a circuit simulation tool like PSpice, follow the specific software's instructions for circuit setup, parameter settings, and result measurement, and then analyze the obtained results. The simulation outputs and comparisons would provide a more comprehensive understanding of the half-wave rectifier circuit's behavior and performance.
Please note that without the actual PSpice software and the specific circuit configuration, it is not possible for me to generate the transfer function plot or provide a simulation result for comparison.
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