b. Your avionics system cannot be used to execute approaches to LNAV/VNAV minimums.
Since the avionics system does not use WAAS (Wide Area Augmentation System) or BARO-VNAV (Barometric Vertical Navigation) systems, it does not meet the necessary requirements for executing approaches to LNAV/VNAV minimums.
LNAV/VNAV approaches typically rely on precise vertical guidance provided by WAAS or BARO-VNAV systems. Without these systems, the avionics system lacks the necessary capabilities to support LNAV/VNAV approaches.
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Which of these is not a reason we might want to measure the size of the economy?
O To track the magnitude of recessions
O To estimate the productive capacity of the country in case of war.
O To measure the happiness of people
O To compare living standards in different countries.
Answer: C
Explanation:
C. Happiness is important but it is not measurable
1.What is three phase? why it is needed?
2. What is the condition to be balanced? Write down voltage equation of a balanced 3 phase voltage source and draw their phasor diagram.
1. We can see here that three phase refers to a type of electrical power transmission that uses three alternating current (AC) waveforms that are 120 degrees out of phase with each other. This is different from single-phase power transmission, which uses only one AC waveform.
What is voltage?Voltage, also known as electric potential difference, is a measure of the electrical potential energy per unit of charge in an electrical circuit. It is defined as the amount of work required to move a unit of electric charge between two points in a circuit, typically measured in volts (V).
Three-phase power is needed because it allows for more power to be transmitted over a given amount of wire or cable. With three-phase power, the power is delivered in a more consistent manner, which means that there is less voltage drop over long distances.
2. In order for a three-phase system to be balanced, the three phases must have the same amplitude and be 120 degrees out of phase with each other. The voltage equation of a balanced three-phase voltage source is given by:
Vph = Vline / √3
where Vph is the phase voltage and Vline is the line voltage. The phasor diagram for a balanced three-phase system shows three sinusoidal waveforms that are displaced by 120 degrees from each other.
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Which actions would the maintenance and operations crews carry out as a building is completed and preparing to open to the public? Select all that apply.
make any last minute repairs
install new equipment and furnishings
troubleshoot solutions to any lingering problems or malfunctions
determine which new residents or company employees will occupy which offices or residences
Answer:
1. make any last minute repairs
2. install new equipment and furnishings
3. troubleshoot solutions to any lingering problems or malfunctions
Explanation:
Given that the role or functions of maintenance and operations crews in building construction are to ensure that the building is maintained to the required standard of use.
This involves making sure that all repairs in a building are done. The equipment is properly installed and solved any form of equipment that malfunctions.
Hence, in this case, the correct answer is:
1. make any last-minute repairs
2. install new equipment and furnishings
3. troubleshoot solutions to any lingering problems or malfunctions
Answer:
1. make any last minute repairs
2. install new equipment and furnishings
3. troubleshoot solutions to any lingering problems or malfunctions
Explanation:
Social Engineering as Art and Science The logic behind social engineering is simple - it can be easy to get all the information and access that one needs from any person as long as you know how to trick a person into giving you the data you need with the least resistance possible. By being able to pull off a social engineering trick, you will be able to get your hands on to a device, account, or application that you need to access in order to perform bigger hacks or hijack an identity altogether. That means that if you are capable of pulling of a social engineering tactic before attempting to go through all other hijacking tactics up your sleeve, you do not need to make additional effort to penetrate a system. To put this entire concept into simpler terms, social engineering is a form of hacking that deals with manipulation of victims through social interaction, instead of having to break right away into a computer system. What makes social engineering difficult is that it is largely based on being able to secure trust, which is only possible by getting someone's trust. For this reason, the most successful hackers are capable of reading possible responses from a person whenever they are triggered to perform any action in relation to their security system. Once you are able to make the right predictions, you will be able to get passwords and other valuable computer assets without having to use too many tools.
Social engineering is considered as both an art and a science. It is a form of hacking that involves the manipulation of victims through social interaction instead of directly breaking into a computer system.
The logic behind social engineering is simple, if one knows how to trick a person into giving out the data they need, they can easily access all the information and access they need with the least resistance possible. This makes social engineering a crucial part of hacking since it allows hackers to gain access to devices, accounts, or applications without making any additional effort.
By using social engineering tactics, a hacker can access a system without having to go through all the other hijacking tactics up their sleeve.The most challenging part of social engineering is securing trust, which is only possible by getting someone's trust. Hackers use various tactics to predict possible responses from a person whenever they are triggered to perform any action in relation to their security system.
The ability to read possible responses from a person is a significant skill for hackers since it enables them to predict passwords and other valuable computer assets without having to use too many tools. Successful hackers use social engineering as a powerful tool to penetrate a system.
In conclusion, social engineering is an essential component of hacking, and a significant part of its success lies in the art of manipulation.
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a(n) ________ is a set of symbols that the sender transmits.
A(n) message is a set of symbols that the sender transmits. A message can be verbal or nonverbal, and it can be transmitted through various communication channels, such as face-to-face interaction, email, text message, or phone call.
The symbols in a message can include words, tone of voice, body language, facial expressions, images, and other visual aids. The sender encodes the message in a way that is intended to convey a specific meaning to the receiver. However, the receiver may decode the message differently based on their own experiences, attitudes, and biases.
Therefore, effective communication requires not only clear encoding but also accurate decoding and feedback. Miscommunication can occur when the sender and receiver have different assumptions or expectations about the meaning of the symbols used in the message. Effective communication involves being aware of these potential barriers and using strategies to overcome them.
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If a horizontal force of P = 100 N is applied to the 300-kg reel of cable, determine its initial angular acceleration. The reel rests on rollers at A and B and has a radius of gyration of k O = 0.6 m.
The initial angular acceleration of the reel of cable is 1.11 rad/s².
To determine the initial angular acceleration of the reel of cable, we need to use the equation τ = Iα, where τ is the torque applied to the reel, I is the moment of inertia, and α is the angular acceleration.
First, we need to find the torque applied to the reel. Since a horizontal force of P = 100 N is applied to the reel, the torque is given by τ = Fr, where F is the force and r is the radius of the reel.
τ = 100 N * 0.6 m = 60 N*m
Next, we need to find the moment of inertia of the reel. The moment of inertia of a solid cylinder is given by I = ½mr², where m is the mass of the cylinder and r is the radius of gyration.
I = ½ * 300 kg * (0.6 m)² = 54 kg*m²
Now we can plug in our values into the equation τ = Iα and solve for α:
60 N*m = 54 kg*m² * α
α = 1.11 rad/s²
Therefore, the initial angular acceleration of the reel of cable is 1.11 rad/s².
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All of the following are common strategies for finding ideas EXCEPT
creating analogies.
O brainstorming with others.
examining existing products.
sitting and walng for inspiration.
Answer:
D. sitting and waiting for inspiration.
Explanation: Seems less reliable then then others
Cho biết tác dụng chung của các hệ giằng khung ngang nhà công nghiệp nhẹ 1 tầng 1 nhịp.
what is the effect of impacts on the structure? on the structure course
Explanation:
Structure controls the major elements of a story, including plot, characters, setting, and theme. ... In this, we see the plot introduced, a crisis or complication, and a resolution. The structure affects the meaning of the story by organizing the theme of the writing.
An astronaut is doing an EVA at the ISS. He is trying to screw in a bolt with a special
zero-gravity wrench. After an hour of unsuccessfully using it, it breaks. The astronaut
gets so mad he winds up and throws the wrench as hard as he can toward the earth.
What will happen to the wrench after that?
Answer:
It will burn up in the atmosphere.
Explanation:
The wrench will assume a decaying elliptical orbit around the earth, eventually entering the denser atmosphere. It will heat sufficiently to melt and evaporate.
53. The plan of a building is in the form of a rectangle with
centerline dimension of outer walls as 9.7mx14.7m. The
thickness of the wall in super structure is 0.30m. Then its
plinth area is
a) 150m
b) 145m2
c) 145.5m
d) 135.36m
.
Answer: 150m
Explanation:
The following can be depicted from the question:
Dimensions of outer walls = 9.7m × 14.7m.
Thickness of the wall = 0.30 m
Therefore, the plinth area of the building will be:
= (9.7 + 0.30/2 + 0.30/2) × (14.7 × 0.30/2 + 0.30/2)
= 10 × 15
= 150m
The plinth area will be 150m.
Given information
Dimensions of outer walls = 9.7m × 14.7m.
Thickness of the wall = 0.30 m
Plinth area of the building = (9.7 + 0.30/2 + 0.30/2) × (14.7 × 0.30/2 + 0.30/2)
Plinth area of the building = 10 × 15
Plinth area of the building = 150m
Therefore, the Option A is correct.
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Engineered lumber should not be used for
A. finger-jointed studs.
B. plywood roof sheathing.
C. composite panel garage doors.
D. items that are in contact with concrete.
Answer:
Composite panel garage doors
Explanation:
Engineered lumber should not be used for composite panel garage doors. Hence, option C is correct.
What is a Pane lift garage door?Horizontal panels are connected to form a single garage door in panel lift doors, sometimes referred to as sectional doors. These panels have wheels attached to them that are positioned in tracks on either side and guide the door through a reasonably sharp turn to reposition it horizontally above the garage door opening.
Yes, however it's crucial to have a pro take their place for the finest outcomes. It can be unsafe for anybody other than a professional to install garage doors due to their complexity and difficulty.
One of the most affordable solutions on the market is an aluminum garage door. They are available in a variety of design options that can complement the exterior style of your home. Low-cost aluminum garage doors.
Thus, option C is correct.
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in a cohort study, epidemiologists usually begin with an exposed group, then assemble a nonexposed group for comparison. this approach is good for
In a cohort study, epidemiologists typically start with an exposed group and then create a nonexposed group for comparison. this approach is good forestudying the effects of specific exposures or interventions on a health outcome.
What is Cohort study?
The comparison between the exposed and non-exposed groups allows the researchers to determine the relationship between the exposure and the outcome, and estimate the magnitude of the effect.
The use of a cohort design helps control for confounding variables and reduces the impact of selection bias, as both groups are typically drawn from a common population and are followed over time.
This type of study is useful for exploring the cause-and-effect relationship between a risk factor and a disease, and is commonly used in the fields of epidemiology, public health, and medical research.
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Answer the following questions (taken from NIEE Case Study). A. On Fred’s first day, Wally says "We’re fast at Phaust. " How might engineering decisions be affected by a corporate culture that emphasizes speed? b. Wally tells Fred he has one rule: whether news is good or bad, Fred must always tell Wally first. I. What is the potential impact of Wally’s "One Rule"? ii. How should Fred respond? c. Chuck alludes to inflating the budget as a hedge against potential budget cuts: i. What is the difference between inflating a budget and providing contingency funds as a line item? Spring 2020 d. At SuisseChem, personnel in operations work with engineering personnel in designing chemical plants, but at Phaust, operations and engineering are clearly separate. What are the implications of separating engineering from operations? e. Was Wally justified in confronting Fred about the environmental meeting? What were his motives? f. Did Fred act responsibly in both: I: lining the evaporation ponds 2: specifying cheaper controls? g. Although the chemical process was supposed to be automated, Fred allowed Manuel to volunteer to control the process manually. Is this reasonable? h. How should a company, such as Phaust, encourage honorable behavior and minimize ethical problems in the future?
Respond to the questions from the NIEE case study:
A. This can result in mistakes, accidents, and other negative outcomes.B. Fred should respond by expressing his concerns about the potential impact of this rule and suggesting alternative ways to ensure that important information is communicated effectively within the company.C. Providing contingency funds, on the other hand, involves setting aside a specific amount of money to cover unforeseen expenses that may arise during the project.D. This can result in inefficiencies and a lack of understanding of the overall goals and needs of the company.E. Specifying cheaper controls may have been irresponsible if it resulted in a lower level of safety or environmental protection.Full explanation about NIEEA. A corporate culture that emphasizes speed may lead to engineering decisions being made hastily without thorough consideration of potential risks or consequences. This can result in mistakes, accidents, and other negative outcomes.
B. Wally's "One Rule" may lead to a lack of transparency and accountability within the company. It may also discourage employees from sharing important information with others who may need to know. ii. Fred should respond by expressing his concerns about the potential impact of this rule and suggesting alternative ways to ensure that important information is communicated effectively within the company.
C. Inflating a budget involves intentionally increasing the estimated cost of a project in order to secure more funding than is actually needed. Providing contingency funds, on the other hand, involves setting aside a specific amount of money to cover unforeseen expenses that may arise during the project.
D. Separating engineering from operations can lead to a lack of communication and collaboration between these two departments. This can result in inefficiencies and a lack of understanding of the overall goals and needs of the company.
E. Wally may have been justified in confronting Fred about the environmental meeting if he felt that Fred was not being transparent about his actions. However, his motives may have been self-serving if he was more concerned about protecting his own reputation than about addressing potential environmental concerns.
F. Fred acted responsibly in lining the evaporation ponds in order to prevent contamination of the surrounding environment. However, specifying cheaper controls may have been irresponsible if it resulted in a lower level of safety or environmental protection.
G. Allowing Manuel to control the process manually may not have been reasonable if it put him or others at risk or if it resulted in a lower level of quality or efficiency.
H. A company like Phaust can encourage honorable behavior and minimize ethical problems by creating a strong code of ethics, providing regular training on ethical issues, and promoting a culture of transparency and accountability.
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Modifications of the original drug structure is very important
a. To reduce the side effect
b. To increase the reactivity
c. Both a & b
d. Only a
Answer:c
Explanation:
Modifications of the original drug structure are very important **to reduce the side effects (option a).
When developing and optimizing drugs, modifying the chemical structure of the original compound can help minimize adverse effects. By making structural changes, researchers aim to improve the drug's selectivity, potency, and pharmacokinetic properties while reducing the likelihood and severity of side effects.
Drug molecules interact with specific targets in the body, such as proteins or enzymes, to produce the desired therapeutic effect. However, these interactions can also affect other biological processes, leading to unintended side effects. Modifying the drug structure can help enhance selectivity, focusing its action on the intended target and reducing interactions with off-target proteins or pathways that may contribute to side effects.
Additionally, structural modifications can impact the drug's metabolism, distribution, and elimination from the body, influencing its pharmacokinetics. Altering the chemical structure can improve the drug's bioavailability, stability, and clearance, ultimately optimizing its therapeutic efficacy while minimizing unwanted effects.
On the other hand, increasing reactivity (option b) is not a primary reason for modifying the drug structure. Reactivity refers to the ability of a compound to undergo chemical reactions. While some modifications may enhance the reactivity of a drug, it is not the main focus when making structural changes. The primary goal is typically to improve the drug's pharmacological properties and minimize side effects.
In summary, modifications of the original drug structure are primarily important **to reduce the side effects** (option a). By altering the chemical structure, drug developers aim to enhance selectivity, improve pharmacokinetic properties, and optimize therapeutic efficacy while minimizing the likelihood and severity of adverse reactions.
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IN general, a high-powered processor is not necessary for a computer that will be used primarily to check email and brwose the weba. trueb. false
a. True. Because these activities require very little processing power. A basic processor such as an Intel Celeron or AMD Athlon will be more than sufficient for most web browsing and email-checking tasks.
What is a processor?A processor is a part of a computer that carries out operations and carries out instructions. It is in charge of carrying out the calculations and data manipulation necessary for a computer to work. It is the most crucial part of a computer system and is frequently referred to as the "brain" of the computer.
The processor contains an Arithmetic Logic Unit (ALU) which is responsible for carrying out arithmetic and logical operations. It also contains a Control Unit (CU) which is responsible for managing the flow of instructions and data to and from the various components of the computer.
The processor also contains a number of registers which are used to store intermediate results during calculations. The processor also contains several cache levels, which are used to store frequently accessed data and instructions in order to speed up the execution of programs.
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Which of the following was an Enlightenment idea that influenced the Founding Fathers?
Answer:
revolt against what they perceived as unfair British taxation.
Explanation:
Answer: natural laws/ natural rights, liberty, justice, and equality
Explanation:
All of the following are ways to help locate a coolant leak source except?
Dye test
Scan tool
Visual inspection
Pressure test
Answer:
Scan tool
Explanation:
pressure testing is the best way of testing for a colant leak
a scan tool literally does nothing for a coolant leak
What is the meaning of beauty and completeness? In relation to these what are the attributes a Muslim should adopt?
ᴄᴏᴍᴘʟᴇᴛᴇɴᴇꜱꜱ ᴍᴇᴀɴꜱ ᴛʜᴇ ꜱᴛᴀᴛᴇ ᴏꜰ ʙᴇɪɴɢ ᴄᴏᴍᴘʟᴇᴛᴇ ᴀɴᴅ ᴇɴᴛɪʀᴇ; ʜᴀᴠɪɴɢ ᴇᴠᴇʀʏᴛʜɪɴɢ ᴛʜᴀᴛ ɪꜱ ɴᴇᴇᴅᴇᴅ.
ʙᴇᴀᴜᴛʏ ᴍᴇᴀɴꜱ combination of qualities, such as shape, colour, or form, that pleases the aesthetic senses, especially the sight.
technician a says that map sensors use a 5-volt reference voltage from the pcm. technician b says the map sensor voltage will be higher at idle at high altitudes compared to when the engine is operating at near sea level. which technician is correct?
Technician A is correct in stating that MAP (manifold absolute pressure) sensors use a 5-volt reference voltage from the PCM (powertrain control module) to measure engine load.
This voltage is used to determine the amount of air entering the engine and adjust the fuel injection accordingly. Technician B is also correct in stating that the MAP sensor voltage will be higher at idle at high altitudes compared to when the engine is operating at near sea level. This is because at higher altitudes, there is less air pressure, which affects the pressure in the engine. This change in pressure affects the voltage output of the MAP sensor. In summary, both technicians are correct in their statements.
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4.
Describe the correct use of any equipment used to protect the health and safety of themselves and
their colleagues
Items such as gloves, safety goggles, shoes, earplugs, respirators, hard hats, coveralls, vests, and full body suits are examples of personal protection equipment.
What equipment is used for safety and protection?Wearing a safety helmet when using a power tool, donning the proper protective clothing when working with chemicals, and taking all necessary safety precautions when operating machinery are all examples of how to use equipment correctly to safeguard their own health and the health and safety of their coworkers.
Healthcare Facilities Using PPE Gloves shield the hands; gowns or aprons shield the skin or clothing; masks and respirators shield the mouth and nose; goggles shield the eyes; and face shields shield the full face. consisting of goggles, gloves, gowns, shoe covers, head coverings, masks, and respiratory equipment.
PPE, or personal protective equipment, is gear that shields users from harm to their health or the danger of accidents. It may consist of equipment like safety harnesses, gloves, eye protection, high-visibility clothes, safety footwear, and respiratory protective equipment (RPE).
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The _____ controls the opening of engine’s valves.
(A) camshaft
(B) crankshaft
(C) valve springs
(D) combustion chamber
A 32x10^-6 F capacitor is connected to a 60V AC supply in series with a 56 ohm resistor. The current flowing in the circuit is 0.16 A.
Calculate the frequency of the AC supply.
The frequency of the AC supply is 0.036 Hz.
What is the frequency?We know that an alternating current circuit is the kind of circuit in which we do have the resistor in addition to the to the capacitor or the inductor or both as the case may be.
Here we are told that; A 32x10^-6 F capacitor is connected to a 60V AC supply in series with a 56 ohm resistor. The current flowing in the circuit is 0.16 A.
We can tell that the impedance of the circuit can be obtained by the use of the formula;
V = IZ
V = voltage
I = current
Z = impedance
Z = V/I
Z = 60 V/0.16 A
Z = 375 ohms
Then we have;
Z = √R^2 - XC^2
375 = √(56)^2 - (1/2 * 3.142 * f * 32x10^-6)^ 2
140625 = 3136 - (1/2 * 3.142 * f * 32x10^-6)^ 2
140625 - 3136 = (1/2 * 3.142 * f * 32x10^-6)^ 2
137489 = 1/2 * 10^-4 f
137489 * 2 * 10^-4 f = 1
f = 1/137489 * 2 * 10^-4
f = 0.036 Hz
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What are the four scanning systems as per biomedical engineering
Answer:
- Ultrasound scanning system
- Magnetic Resonance Imaging (MRI)
- Computed tomography (CT)
- X - Ray scan
Explanation:
\(.\)
Answer:
- USS Ultarsound
- Medical sonography
Water flows steadily from a large, closed tank. the deflection in the mercury manometer is 25mm and viscous effects are negligible. determine the volume flow rate in litres per second
The volume flow rate is 250 liters per second. Water flows steadily from a large, closed tank. the deflection in the mercury manometer.
When water flows steadily from a large, closed tank, the deflection in the mercury manometer is 25mm, and viscous effects are negligible, the volume flow rate in litres per second can be determined using the following formula:
Q = [\((d1^2 - d2^2)/4\)] * A * v
where Q is the volume flow rate, d1 and d2 are the diameters of the two arms of the manometer, A is the cross-sectional area of the tube, and v is the velocity of the fluid in the tube. Since the viscous effects are negligible, we can assume that the velocity of the fluid in the tube is constant.
We can also assume that the cross-sectional area of the tube is constant throughout the length of the tube. Therefore, we can simplify the formula to:
Q = K * h
where K is a constant that depends on the diameter and cross-sectional area of the tube, and h is the deflection in the manometer.To determine the value of K, we need to know the diameters and cross-sectional areas of the tube. Since the tube is not specified, we cannot determine the value of K. However, we can still calculate the volume flow rate if we assume that the value of K is known.
For example, if K is equal to 10 liters per millimeter, and the deflection in the manometer is 25mm, then the volume flow rate is:
Q = K * h = 10 * 25 = 250 liters per second
Therefore, the volume flow rate is 250 liters per second.Answer: In order to determine the volume flow rate in litres per second, the following formula can be used:Q = [(d1^2 - d2^2)/4] * A * vWhere Q is the volume flow rate, d1 and d2 are the diameters of the two arms of the manometer, A is the cross-sectional area of the tube, and v is the velocity of the fluid in the tube. If the viscous effects are negligible, we can assume that the velocity of the fluid in the tube is constant, and the cross-sectional area of the tube is constant throughout the length of the tube. Hence, the formula can be simplified as follows:Q = K * h
Where K is a constant that depends on the diameter and cross-sectional area of the tube, and h is the deflection in the manometer. The value of K can be calculated if the diameters and cross-sectional areas of the tube are known. Assuming that the value of K is 10 liters per millimeter, and the deflection in the manometer is 25mm, the volume flow rate is:
Q = K * h = 10 * 25 = 250 liters per second
Therefore, the volume flow rate is 250 liters per second.
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A producer is someone who _____________.
A.
Makes a commodity available for sale or exchange
B.
Buys or trades in order to receive a commodity
C.
Is in the market for a commodity
D.
Receives a commodity from a business
Answer: A. Makes a commodity available for sale or exchange
Explanation: hope it helps ^w^
In older cities across South Africa, infrastructure is deteriorating, including water lines that supply homes and businesses. A report to the Gqeberha municipal council stated that there are on average 30 water line breaks per 100km’s a year in the city. Outside Gqeberha, the number of breaks is 15/km a year
Where the above conditions are given:
A) we can calculate this probability to be approximately 0.1665 or 16.65%.
B) we can calculate this probability to be approximately 0.1612 or 16.12%.
a) Let X be the number of water line breaks in a stretch of 100kks in Gqeberha in a year. We know that X follows a Poisson distribution with λ = 30. To find the probability of 35 or more breaks, we can use the Poisson distribution formula:
P(X ≥ 35) = 1 - P(X < 35) = 1 - Σi=0^34 e^(-30) * 30^i / i!
Using a calculator or software, we can calculate this probability to be approximately 0.1665 or 16.65%.
b) Let Y be the number of water line breaks in a stretch of 100kks outside of Gqeberha in a year. We know that Y follows a Poisson distribution with λ = 15. To find the probability of 12 or fewer breaks, we can again use the Poisson distribution formula:
P(Y ≤ 12) = Σi=0^12 e^(-15) * 15^i / i!
Using a calculator or software, we can calculate this probability to be approximately 0.1612 or 16.12%.
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Full Question:
Although part of your question is missing, you might be referring to this full question:
In Older Cities Across South Africa, Infrastructure Is Deteriorating, Including Water Lines That Supply Homes And Businesses. A Report To The Gqeberha Municipal Council Stated That There Are On Average 30 Water Line Breaks Per 100 ’ A Year In The City. Outside Gqeberha, The Number Of Breaks Is 15/ A Year. A) Find The Probability That In A
In older cities across South Africa, infrastructure is deteriorating, including water lines that supply homes and businesses. A report to the Gqeberha municipal council stated that there are on average 30 water line breaks per 100 ’ a year in the city. Outside Gqeberha, the number of breaks is 15/ a year.
a) Find the probability that in a stretch 100 ’ in Gqeberha there will be 35 or more breaks next year. (3)
b) Find the probability that there will be 12 or fewer breaks in a stretch of 100 ′ outside of Gqeberha next year.
Hey guys can anyone list chemical engineering advancement that has been discovered within the past 20 years
Determine the resistance of 3km of copper having a diameter of 0,65mm if the resistivity of copper is 1,7x10^8
Answer:
Resistance of copper = 1.54 * 10^18 Ohms
Explanation:
Given the following data;
Length of copper, L = 3 kilometers to meters = 3 * 1000 = 3000 m
Resistivity, P = 1.7 * 10^8 Ωm
Diameter = 0.65 millimeters to meters = 0.65/1000 = 0.00065 m
\( Radius, r = \frac {diameter}{2} \)
\( Radius = \frac {0.00065}{2} \)
Radius = 0.000325 m
To find the resistance;
Mathematically, resistance is given by the formula;
\( Resistance = P \frac {L}{A} \)
Where;
P is the resistivity of the material. L is the length of the material.A is the cross-sectional area of the material.First of all, we would find the cross-sectional area of copper.
Area of circle = πr²
Substituting into the equation, we have;
Area = 3.142 * (0.000325)²
Area = 3.142 * 1.05625 × 10^-7
Area = 3.32 × 10^-7 m²
Now, to find the resistance of copper;
\( Resistance = 1.7 * 10^{8} \frac {3000}{3.32 * 10^{-7}} \)
\( Resistance = 1.7 * 10^{8} * 903614.46 \)
Resistance = 1.54 * 10^18 Ohms
The diameter of a cylindrical water tank is Do and its height is H. The tank is filled with water, which is open to the atmosphere. An orifice of diameter D with a smooth entrance (i.e., negligible losses) is open at the bottom. Develop a relation for the time required for the tank (a) to empty halfway (5-point) and (b) to empty completely (5-point).
Answer:
a. The time required for the tank to empty halfway is presented as follows;
\(t_1 = \dfrac{D_0^2 }{D^2 } \cdot \sqrt{ \dfrac{H}{g} } \cdot \left (\sqrt{2} -1 \right)\)
b. The time it takes for the tank to empty the remaining half is presented as follows;
\(t_2 = { \dfrac{ D_0^2 }{D} \cdot\sqrt{\dfrac{H}{g} }\)
The total time 't', is presented as follows;
\(t = \sqrt{2} \cdot \dfrac{D_0^2 }{D^2 } \cdot \sqrt{ \dfrac{H}{g} }\)
Explanation:
a. The diameter of the tank = D₀
The height of the tank = H
The diameter of the orifice at the bottom = D
The equation for the flow through an orifice is given as follows;
v = √(2·g·h)
Therefore, we have;
\(\dfrac{P_1}{\gamma} + z_1 + \dfrac{v_1}{2 \cdot g} = \dfrac{P_2}{\gamma} + z_2 + \dfrac{v_2}{2 \cdot g}\)
\(\left( \dfrac{P_1}{\gamma} -\dfrac{P_2}{\gamma} \right) + (z_1 - z_2) + \dfrac{v_1}{2 \cdot g} = \dfrac{v_2}{2 \cdot g}\)
Where;
P₁ = P₂ = The atmospheric pressure
z₁ - z₂ = dh (The height of eater in the tank)
A₁·v₁ = A₂·v₂
v₂ = (A₁/A₂)·v₁
A₁ = π·D₀²/4
A₂ = π·D²/4
A₁/A₂ = D₀²/(D²) = v₂/v₁
v₂ = (D₀²/(D²))·v₁ = √(2·g·h)
The time, 'dt', it takes for the water to drop by a level, dh, is given as follows;
dt = dh/v₁ = (v₂/v₁)/v₂·dh = (D₀²/(D²))/v₂·dh = (D₀²/(D²))/√(2·g·h)·dh
We have;
\(dt = \dfrac{D_0^2}{D} \cdot\dfrac{1}{\sqrt{2\cdot g \cdot h} } dh\)
The time for the tank to drop halfway is given as follows;
\(\int\limits^{t_1}_0 {} \, dt = \int\limits^h_{\frac{h}{2} } { \dfrac{D_0^2}{D} \cdot\dfrac{1}{\sqrt{2\cdot g \cdot h} } } \, dh\)
\(t_1 =\left[{ \dfrac{D_0^2}{D\cdot \sqrt{2\cdot g} } \cdot\dfrac{h^{-\frac{1}{2} +1}}{-\frac{1}{2} +1 } \right]_{\frac{H}{2} }^{H} =\left[ { \dfrac{D_0^2 \cdot 2\cdot \sqrt{h} }{D\cdot \sqrt{2\cdot g} } \right]_{\frac{H}{2} }^{H} = { \dfrac{2 \cdot D_0^2 }{D\cdot \sqrt{2\cdot g} } \cdot \left(\sqrt{H} - \sqrt{\dfrac{H}{2} } \right)\)
\(t_1 = { \dfrac{2 \cdot D_0^2 }{D^2\cdot \sqrt{2\cdot g} } \cdot \left(\sqrt{H} - \sqrt{\dfrac{H}{2} } \right) = { \dfrac{\sqrt{2} \cdot D_0^2 }{D^2\cdot \sqrt{ g} } \cdot \left(\sqrt{H} - \sqrt{\dfrac{H}{2} } \right)\)
\(t_1 = { \dfrac{\sqrt{2} \cdot D_0^2 }{D^2\cdot \sqrt{ g} } \cdot \left(\sqrt{H} - \sqrt{\dfrac{H}{2} } \right) = { \dfrac{D_0^2 }{D^2\cdot \sqrt{ g} } \cdot \left(\sqrt{2 \cdot H} - \sqrt{{H} } \right) =\dfrac{D_0^2 }{D^2 } \cdot \sqrt{ \dfrac{H}{g} } \cdot \left (\sqrt{2} -1 \right)\)The time required for the tank to empty halfway, t₁, is given as follows;
\(t_1 = \dfrac{D_0^2 }{D^2 } \cdot \sqrt{ \dfrac{H}{g} } \cdot \left (\sqrt{2} -1 \right)\)
(b) The time it takes for the tank to empty completely, t₂, is given as follows;
\(\int\limits^{t_2}_0 {} \, dt = \int\limits^{\frac{h}{2} }_{0 } { \dfrac{D_0^2}{D} \cdot\dfrac{1}{\sqrt{2\cdot g \cdot h} } } \, dh\)
\(t_2 =\left[{ \dfrac{D_0^2}{D\cdot \sqrt{2\cdot g} } \cdot\dfrac{h^{-\frac{1}{2} +1}}{-\frac{1}{2} +1 } \right]_{0}^{\frac{H}{2} } =\left[ { \dfrac{D_0^2 \cdot 2\cdot \sqrt{h} }{D\cdot \sqrt{2\cdot g} } \right]_{0 }^{\frac{H}{2} } = { \dfrac{2 \cdot D_0^2 }{D\cdot \sqrt{2\cdot g} } \cdot \left( \sqrt{\dfrac{H}{2} } -0\right)\)
\(t_2 = { \dfrac{ D_0^2 }{D} \cdot\sqrt{\dfrac{H}{g} }\)
The time it takes for the tank to empty the remaining half, t₂, is presented as follows;
\(t_2 = { \dfrac{ D_0^2 }{D} \cdot\sqrt{\dfrac{H}{g} }\)
The total time, t, to empty the tank is given as follows;
\(t = t_1 + t_2 = \dfrac{D_0^2 }{D^2 } \cdot \sqrt{ \dfrac{H}{g} } \cdot \left (\sqrt{2} -1 \right) + t_2 = { \dfrac{ D_0^2 }{D} \cdot\sqrt{\dfrac{H}{g} } = \dfrac{D_0^2 }{D^2 } \cdot \sqrt{ \dfrac{H}{g} } \cdot \sqrt{2}\)
\(t = \sqrt{2} \cdot \dfrac{D_0^2 }{D^2 } \cdot \sqrt{ \dfrac{H}{g} }\)