Given data:Saturated liquid water is cooled from 80°F to 40°F still saturated.Formulas used:Enthalpy change (ΔH) = mcΔTWhere.
m = mass of water in lb;
ΔT = Change in temperature in
°F;c = specific heat of water in BTU/(lb °F);
AÊ = Internal energy (U) of saturated liquid at 80°F in BTU/lb;
AÊ, AP = Enthalpy (H) of saturated liquid at 80°F in BTU/lb;
AU = Internal energy (U) of saturated liquid at 40°F in BTU/lb;
AÑ = Enthalpy (H) of saturated liquid at 40°F in BTU/lb.
Calculation of AÊ, AP:
From the steam tables,Enthalpy (H) of saturated liquid at
80°F, AÊ, AP = 28.08 BTU/lb
Internal energy (U) of saturated liquid at
80°F, AÊ = 28.01 BTU/lb.
Calculation of AU, AÑ:
From the steam tables,Internal energy (U) of saturated liquid at 40°F,
AU = 27.60 BTU/lb
Enthalpy (H) of saturated liquid at 40°F,
AÑ = 27.65 BTU/lb
Calculation of ΔH:
ΔT = (80 - 40) = 40°
Fm = mass of water
= 1 lbc = specific heat of wate
r = 1 BTU/(lb °F)
ΔH = mcΔT= 1 x 1 x 40= 40 BTU/lb.
Calculation of AU:
AU = AÊ + ΔHAU = 28.01 + 40= 68.01 BTU/lb.
Calculation of AÑ:
AÑ = AÊ, AP + ΔHAÑ = 28.08 + 40= 68.08 BTU/lb.
Hence, the values of
AÊ, AU, AÊ, AP, and AÑ are as follows:
AÊ = 28.01 BTU/lb;
AU = 68.01 BTU/lb;AÊ, AP = 28.08 BTU/lb;
AÑ = 68.08 BTU/lb.
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go lite, a maker of outdoor gear, integrates the________ into its mission, which is to offset 100% of its environmental footprint.
Outdoor gear manufacturer Go Lite incorporates the natural Measurement into its objective to completely offset its environmental impact.
What are common measuring units?Seven measures are known as basic units: metre, kg, minute, ampere, kelvin, mole, as well as corona. The first and most prevalent of them are meters, seconds, and kilograms.
How many different kinds of measures exist?The remaining units, including the area, mass, force, acceleration, and others we just examined, are derived from some of these fundamental seven units of measurement. Please kindly find the seven separate quantities as well as their respective results are tabulated listed below.
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Consider a Rankine cycle with reheat using water (steam) as the working fluid. Saturated liquid at 100C exits the condenser. The fluid exits the boiler at 6500C, 20000 kPa. The cycle uses a single reheater with operating pressure 200 kPa and exit temperature 5000C. The mass flow rate of water (steam) in the cycle is 40 kg/s. The operation of the turbines and pump are adiabatic and have isentropic efficiency 0.90. As usual, neglect pressure losses in piping, boiler, reheater, and condenser. Compute: quality at the exit of the high-pressure turbine.
Design a 3-bit binary counter using S-R flip flops.
Answer:
This is an asynchrnous 3-bit counter. Just note that this design is different and works differently than its synchronous counterpart. It's an easier design than its synchronous counterpart, and is not as reliable because it has delays.
Which type of voltage do generators produce?
Generators are essential components of electric power systems. They contain wire coils placed between the magnets. They produce a/n voltage when they spin between the poles of the magnetic field, or when magnets spin around them.
Answer:
How does electricity produce magnetism?
Explanation:
When the electricity is switched on, the electric magnets create powerful magnetic fields. Coils of wire are mounted around the shaft. As the shaft with the magnets rotates, the coils of wire are exposed to changing magnetic fields, and an electric current is generated in the wires.
Answer:
Explanation:
I am pretty sure it depends but most of the time I think they produce direct current/voltage.
data from numerous studies demonstrate that, in many situations, any ____ are irrelevant
Answer:
Data from numerous studies demonstrate that, in many situations, any biases are irrelevant.
giúp em làm câu này với ạ em cám ơn em cần gấp lắm
Answer:
the problem I see real people here to have that much respect that is not going in that direction or the best.
QUESTION 4:
4.1
Name FOUR principles of kinetic friction
Answer:
The force of friction always acts in a direction, opposite to that in which the body is moving.
The magnitude of kinetic friction bears a constant ratio to the normal reaction between the two surfaces. ...
For moderate speeds, the force of friction remains constant.
Answer:
Explanation:Kinetic friction is a force that acts between moving surfaces. An object that is being moved over a surface will experience a force in the opposite direction as its movement. The magnitude of the force depends on the coefficient of kinetic friction between the two kinds of material.
Describe why the motion of a follower acted on by a cam is periodic motion.
An automobile having a mass of 1100 kg initially moves along a level highway at 120 km/h relative to the highway. It then climbs a hill whose crest is 80 m above the level highway and parks at a rest area located there. Use a reference with kinetic and potential energy each equal to zero for the stationary highway before the hill. Let g = 9.81 m/s^2.
For the automobile, determine its change in kinetic energy and its change in potential energy, both in kJ. For the automobile, determine its change in kinetic energy, in kJ.
a. -8594
b. -663.1
c. -6.63x10^5
d. 663.1
Answer:
\(-6111.11\ \text{kJ}\)
\(863.28\ \text{kJ}\)
Explanation:
m = Mass of automobile = 1100 kg
v = Velocity of car = 120 km/h = \(\dfrac{120}{3.6}\ \text{m/s}\)
h = Height of hill = 80 m
g = Acceleration due to gravity = \(9.81\ \text{m/s}^2\)
Change in kinetic energy
\(KE=\dfrac{1}{2}m(u^2-v^2)\\\Rightarrow KE=\dfrac{1}{2}\times 1100\times (0-(\dfrac{120}{3.6})^2)\\\Rightarrow KE=-611111.11\ \text{J}\)
Change in kinetic energy is \(-6111.11\ \text{kJ}\)
Change in potential energy is given by
\(PE=mgh\\\Rightarrow PE=1100\times 9.81\times 80\\\Rightarrow PE=863280\ \text{J}\)
The change in potential energy is \(863.28\ \text{kJ}\).
2.12.5: Four Corners
Answer:
speed(0)
square_length = int(input("What is the length of the square?"))
def draw_square():
pendown()
for i in range(4):
forward(square_length)
left(90)
penup()
penup()
setposition(-200, -200)
draw_square()
penup()
setposition(-200, 200 - square_length)
draw_square()
penup()
setposition(200 - square_length, 200 - square_length)
draw_square()
penup()
setposition(200 - square_length, -200)
draw_square()Explanation:
Compute the area and circumference of a circle given the radius r if the radius is greater than or equal to 1.0; otherwise, you should compute only the circumference. Repeat the algorithm as much as the user wants.
In this question we shall present the algorithm in pseudocode, whose structure is now summarized:
1) Inputs.
2) Algorithms.
3) Outputs.
Please notice that While-cycles consider the requirement of using the algorithm as many times as user wants.
Name: Area-or-Circunference
CHAR - decide
REAL - radius, circumference, area
Say "Do you want to calculate? [Y] - Yes/[N] - No";
Write decide;
While (decide != 'Y' and decide != 'y' and decide != 'N' and decide != 'n'):
Say "Invalid option. Do you want to calculate? [Y] - Yes/[N] - No";
Write decide;
end-While
While (decide = 'Y' or decide = 'y'):
Say "Please indicate a radius";
While (radius < 0):
Say "Radius must be equal or greater than 0. Please indicate a
radius";
Write radius;
end-While
If (radius < 1):
circumference = 2*3.14*radius;
Say "The circumference has a value of %circumference length units";
Else:
circumference = 2*3.14*radius;
area = 3.14*radius*radius;
Say "The circumference has a value of %circumference length units
and the area has a value of %area square units";
end-If
Say "Do you want to calculate? [Y] - Yes/[N] - No";
Write decide;
While (decide != 'Y' and decide != 'y' and decide != 'N' and decide !=
'n'):
Say "Invalid option. Do you want to calculate? [Y] - Yes/[N] - No";
Write decide;
end-While
end-While
If (decide = 'N' or decide = 'n'):
Say "Good luck";
end-If
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Which of the following are desirable characteristics of refractory ceramics?
a. Ability to remain unreactive and inert in severe environments.
b. Ability to withstand high temperatures.
c. Ability to withstand low temperatures.
d. High strengths.
e. Thermally insulative.
the following are desirable characteristics of refractory ceramics
a. Ability to remain unreactive and inert in severe environments.
b. Ability to withstand high temperatures.
d. High strengths.
e. Thermally insulative.
The ability to withstand high temperatures is essential for refractory ceramics, as they are often used in high-temperature applications such as furnaces and kilns. The ability to remain unreactive and inert in severe environments is also important to ensure that the material does not react with the surrounding environment or other materials in the system, which could lead to degradation or failure of the component. High strength is desirable to prevent fracture or deformation under mechanical loads. Lastly, being thermally insulative is useful for applications where heat needs to be contained or controlled within a given space.
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Of the core elements of successful safety and health programs, Management Leadership, Worker Participation, and what else relate to individuals' roles?
Answer:
Education and training I did the TEST and got it right.
Of the core elements of successful safety and health programs, the other one aside the given two that relates to individual roles is;
Education and Training Program.
According to OSHA(Occupational Safety and Health Administration), there are 7 core elements of an effective safety and health program.
These 7 core elements are namely;
1) Management Leadership.
2) Worker Participation.
3) Hazard Identification & Assessment.
4) Hazard Prevention & Control.
5) Education & Training Program.
6) Evaluation & Improvement.
7) Management of Contractors / Staffed Employees.
Now, we have been given 2 of the 7 which are Management leadership and
worker participation. However, we are told to find another one that relates
to individual roles. The only other one that is individual specific is Education
and Training program because it is the responsibility of every staff from top
to bottom to know all about safety.
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According to NFPA 72, which type of alarm is caused by improper installation of an alarm system?
Answer:
The highly regarded NFPA 72 standard serves as a comprehensive guide for the installation, testing, and maintenance of fire alarm systems across the United States. This standard provides detailed requirements and recommendations to ensure that alarm systems are capable of notifying building occupants of a fire emergency and averting potential harm. One key aspect of the NFPA 72 standard is the identification of the type of alarm that may result from improper installation of an alarm system.
As outlined by the NFPA 72 standard, the type of alarm that may occur due to poor installation is a nuisance alarm. A nuisance alarm is a false alarm that is triggered when there is no actual danger present. Nuisance alarms can be caused by an overly sensitive detection system, incorrect installation of the sensors, or poor system design. These alarms can disrupt building occupants and reduce the effectiveness of the fire alarm system, leading to complacency in the face of a real emergency. Therefore, it is vital to ensure proper installation of fire alarm systems to minimize the occurrence of nuisance alarms and maintain the reliability of the alarm system.
In summary, following the NFPA 72 standard for the installation and maintenance of fire alarm systems is critical to ensure the safety of building occupants in the event of a fire. Proper installation of the alarm system is essential to prevent nuisance alarms, which can disrupt occupants and lead to complacency in the face of a real emergency. By adhering to the guidelines established in this standard, building owners and managers can guarantee that their fire alarm systems will be effective in alerting occupants to potential danger and reducing the risk of injuries, fatalities, and property damage.
Answer:
The highly regarded NFPA 72 standard serves as a comprehensive guide for the installation, testing, and maintenance of fire alarm systems across the United States. This standard provides detailed requirements and recommendations to ensure that alarm systems are capable of notifying building occupants of a fire emergency and averting potential harm. One key aspect of the NFPA 72 standard is the identification of the type of alarm that may result from improper installation of an alarm system.As outlined by the NFPA 72 standard, the type of alarm that may occur due to poor installation is a nuisance alarm. A nuisance alarm is a false alarm that is triggered when there is no actual danger present. Nuisance alarms can be caused by an overly sensitive detection system, incorrect installation of the sensors, or poor system design. These alarms can disrupt building occupants and reduce the effectiveness of the fire alarm system, leading to complacency in the face of a real emergency. Therefore, it is vital to ensure proper installation of fire alarm systems to minimize the occurrence of nuisance alarms and maintain the reliability of the alarm system.In summary, following the NFPA 72 standard for the installation and maintenance of fire alarm systems is critical to ensure the safety of building occupants in the event of a fire. Proper installation of the alarm system is essential to prevent nuisance alarms, which can disrupt occupants and lead to complacency in the face of a real emergency. By adhering to the guidelines established in this standard, building owners and managers can guarantee that their fire alarm systems will be effective in alerting occupants to potential danger and reducing the risk of injuries, fatalities, and property damage.
All heavy-duty commercial vehicles use what kind of camber because a loaded vehicle will bend the axle slightly?
A. Positive camber
B. Negative camber
C. Zero camber
D. Dynamic camber
E. Static camber
All heavy-duty commercial vehicles use zero camber because a loaded vehicle will bend the axle slightly, resulting in a natural positive camber.
By setting the initial camber at zero, the vehicle will achieve the desired camber under load, providing better handling and stability.
"All heavy-duty commercial vehicles use what kind of camber because a loaded vehicle will bend the axle slightly?"
Your answer: A. Positive camber
Heavy-duty commercial vehicles use positive camber because when the vehicle is loaded, the axle will bend slightly, causing the wheels to tilt towards a more upright or zero camber position, improving tire contact with the road and enhancing stability.
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Heavy-duty commercial vehicles typically use zero camber because a loaded vehicle will bend the axle slightly. Camber refers to the angle of the wheels in relation to the vertical axis.
Positive camber means the tops of the wheels are tilted outwards, while negative camber means the tops of the wheels are tilted inwards. Zero camber means the wheels are perpendicular to the ground.When a heavy-duty commercial vehicle is loaded, the weight of the cargo causes the axle to bend slightly, which can cause the wheels to tilt outwards and create positive camber. This can lead to uneven tire wear, poor handling, and decreased stability.By using zero camber, the wheels remain perpendicular to the ground even when the vehicle is loaded. This helps to ensure even tire wear, better handling, and increased stability. Static camber, which refers to the angle of the wheels when the vehicle is stationary, may also be used in conjunction with zero camber to further improve handling and stability.Overall, using zero camber in heavy-duty commercial vehicles helps to ensure safety and reliability, especially when transporting heavy loads over long distances.For such more question on stability
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Help meeeeeeeee plzzzzz need explanation
the picture is blank for me what does it say i can comment the answer plz mark brainlyist
In python, how would I randomize numbers and insert them into a file?
he period during annealing where there is little change in ductility and yield strength but typically a large change in electrical conductivity and corrosion resistance is called:
The "recovery" stage is the time during annealing when there is little change in ductility and yield strength but usually a significant change in electrical conductivity and corrosion resistance.
What takes place when annealing?The metal is heated to a certain temperature during the annealing process so that recrystallization can take place. Any flaws brought on by the metal's deformation are now fixed. After maintaining that temperature for a predetermined amount of time, the metal is cooled to room temperature.
What transpires to metals when they are annealed?The physical and occasionally chemical qualities of a material are altered during the annealing process, which increases ductility and decreases hardness to make a material more workable.
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The current in the wires of a circuit is 90 milliAmps. If the resistance of the circuit were doubled (with no change in voltage), then its new current would be _____ milliAmps.
Answer:
\(I = 45mA\)
Explanation:
Given
\(I = 90mA\) --- Current
Required
Determine the new current when resistance is doubled
Using \(V = IR\)
Initially, we have:
\(V = 90mA * R\)
When resistance is doubled and voltage remains unaltered, we have:
\(V = I* 2R\)
2R represents the new resistance and I represents the new current
Equate both values of V
\(90mA * R = I* 2R\)
Make I the subject
\(I = \frac{90mA * R}{2R}\)
\(I = \frac{90mA }{2}\)
\(I = 45mA\)
The new current is 45milliAmps
What is the core domain for Accenture’s Multi-party Systems practice?
A. digital identity
B. employee retention
C. social networking
D. marketing responsiveness
Answer:
a
Explanation:
digital identity is the answer
The core domain for Accenture’s multi-party System is that of a digital identity. Ths that option A is correct.
What is a Multi-party System?A multiparty system is a shared data infrastructure within the individual and the organizations that drive the efficiency nf new business and lead to the formation of the revenue models. They include the blockchain and distribution database and include a variety of technology and other capabilities.
Find out more information about the multi-party systems.
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An aqueous alumina slip containing 45 volume % alumina particles is cast into a gypsum mold. The ceramic particles are monodisperse with a size of 1 um and they are well-stabilized. The as-cast layer is 65% of theoretical density. The gypsum mold has a specific resistance of 2 x 100 cm2 and a void fraction of 0. 5. The total pressure drop from the slip to the saturation interface in the mold is 0. 1 MPa. Plot the cast layer thickness as a function of time. Predict the time needed to cast a 1 mm thick layer and the position of the saturation front in the gypsum mold at that time
In this scenario, we have an aqueous alumina slip containing 45 volume % alumina particles being cast into a gypsum mold. The alumina particles are monodisperse with a size of 1 µm and well-stabilized.
The as-cast layer has a 65% theoretical density, and the gypsum mold has a specific resistance of 2 x 100 cm² and a void fraction of 0.5. The total pressure drop from the slip to the saturation interface in the mold is 0.1 MPa.To plot the cast layer thickness as a function of time, we can utilize Darcy's Law, which governs the flow of a fluid through a porous medium. However, without specific numerical values for the slip's viscosity and the mold's permeability, it is not possible to directly calculate the layer thickness and time relationship.
Nevertheless, to predict the time needed to cast a 1 mm thick layer and the position of the saturation front in the gypsum mold, we would need to perform experiments or numerical simulations based on the given parameters, such as particle size, slip composition, and mold properties. These results could then be used to develop an empirical or theoretical relationship between cast layer thickness and time, enabling accurate predictions for the given conditions.
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A sheet of steel 1.5 mm thick has nitrogen (N2) atmospheres on both sides at 1200°C and is permitted to achieve steady-state diffusion condition. The diffusion coefficient for N2 in steel at this temperature is 6 ´ 10-11 m2 /s, and the diffusion flux is found to be 1.2 ´ 10-7 kg/m2 -s. Also, it is known that the concentration of N2 in the steel at the high-pressure surface is 4 kg/m3 . How far into the sheet from the high-pressure side will the concentration be 2.0 kg/m3 ? Assume a linear concentration profile.
Answer:
do the wam wam
Explanation:
Write a program to play the Card Guessing Game. Your program must give the user the following choices: - Guess only the face value of the card. - Guess only the suit of the card. - Guess both the face value and the suit of the card. Before the start of the game, create a deck of cards. Before each guess, use the function random_shuffle to randomly shuffle the deck.
how am I going to do this, I have a friend that might be able to help I will check
Sensors are used to monitor the pressure and the temperature of a chemical solution stored in a vat. The circuitry for each sensor produces a HIGH voltage when a specified maximum value is exceeded. An alarm requiring a LOW voltage input must be activated when either the pressure or the temperature is excessive. Design a circuit for this application
Who is Robert Goldard
Answer:
An am American engineer
NatGas Corporation obtains a federal license to operate a gas pipeline through a certain area of Oregon. The Oregon state legislature enacts a law that bans gas pipelines in that area. Most likely, the state law violates:________
a. the due process clause.
b. the supremacy clause.
c. the U.S. Constitution.
d. the commerce clause.
Answer:
c. the U.S. Constitution.
Explanation:
A Constitution refers to a set of written laws and principles which is typically used to determine the power and authority of the government, as well as guarantee the fundamental rights of its citizens.
Basically, the Constitution accords powers to the national or federal government and these includes; enumerated or delegated, reflected, and concurrent powers. Therefore, base on the US Constitution, any law, act, or license issued and approved by the federal government supercedes or overrides any state law.
In this scenario, NatGas Corporation obtains a federal license to operate a gas pipeline through a certain area of Oregon. The Oregon state legislature enacts a law that bans gas pipelines in that area. Most likely, the state law violates the U.S. Constitution because a federal law is supreme.
Two flows of air are both at 200 kPa; one is at 400 K with a flow rate of 1 kg/s, and the other is at 290 K with a flow rate of 2 kg/s. The two flows are mixed in an insulated box to produce a single exit flow at 200 kPa. Find the exit temperature and the rate of entropy generation. You may assume an ideal gas with constant specific heat.
Given data:Pressure of the two flows, P = 200 kPaFlow rate of 1st flow, m₁ = 1 kg/sFlow rate of 2nd flow, m₂ = 2 kg/sTemperature of 1st flow, T₁ = 400 KTemperature of 2nd flow, T₂ = 290 KLet the exit temperature be T.
Energy balance equation at the insulated box can be given as:
m₁Cp₁T₁ + m₂Cp₂T₂ = (m₁ + m₂)Cp.T.
(Where Cp₁ and Cp₂ are the specific heats of the gases)Also, the mass flow rate should be conserved:m₁ + m₂ = m₃ (where m₃ is the mass flow rate of the exit flow).
Therefore, the specific heat of the exit flow can be expressed as:
Cp.T = (m₁Cp₁T₁ + m₂Cp₂T₂)/(m₁ + m₂)
Substituting the given values,
Cp.T = (1 x 1005 x 400 + 2 x 1005 x 290)/(1 + 2) = 324.33 J/kg
KAgain, applying energy balance equation,Q₃ - W₃ = 0 (where Q₃ is the heat transferred to the system and W₃ is the work done by the system)Since the process is adiabatic, Q₃ = 0Therefore, W₃ = 0Also, from the second law of thermodynamics, the rate of entropy generation can be expressed as:σ = m₃S.
(Where S is the entropy per unit mass of the exit flow)Now, the entropy balance equation can be given as:
(m₁S₁ + m₂S₂) = m₃S
Where S₁ and S₂ are the specific entropy of the gasesTherefore,
S = (m₁S₁ + m₂S₂)/m₃
Substituting the given values,Specific entropy of 1st flow can be given as.
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Water is boiled in a pot covered with a loosely fitting lid at a location where the pressure is 85.4 kPa. A 2.61 kW resistance heater with 84.5% efficiency supplies heat to the pot. How many minutes will it take to boil 6.03 kg of water?
Answer:
t = 6179.1 s = 102.9 min = 1.7 h
Explanation:
The energy provided by the resistance heater must be equal to the energy required to boil the water:
E = ΔQ
ηPt = mH
where.
η = efficiency = 84.5 % = 0.845
P = Power = 2.61 KW = 2610 W
t = time = ?
m = mass of water = 6.03 kg
H = Latent heat of vaporization of water = 2.26 x 10⁶ J/kg
Therefore,
(0.845)(2610 W)t = (6.03 kg)(2.26 x 10⁶ J/kg)
\(t = \frac{1.362\ x\ 10^7\ J}{2205.45\ W}\)
t = 6179.1 s = 102.9 min = 1.7 h
A technician is setting up a new desktop computer and will be installing the hard drive directly on the motherboard without using cables to connect it. Which of the following will the technician be installing?A. ThunderboltB. eSATAC. M.2D. SCSI
C. M.2. M.2 is a type of storage connection for solid state and hard drives that allows them to be connected directly to the motherboard without the need for cables.
What is motherboard?A motherboard is the main printed circuit board in a computer system. It is sometimes referred to as the system board and serves as the main hub for communication between the different components of the system. The motherboard provides slots for inserting other components such as the central processing unit (CPU), memory modules, and expansion cards. In addition, the motherboard contains connectors for connecting peripheral devices such as the monitor, mouse, keyboard, and other external devices. The motherboard also includes the various ports, such as USB and Ethernet, that allow for communication with other devices. The motherboard is essential for a computer as it is responsible for controlling the system and making sure that all the components are working together.
Thunderbolt and eSATA are both types of external storage connections, while SCSI is an older type of internal storage connection.
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A 1-ft rod with a diameter of 0.5 in. is subjected to a tensile force of 1,300 lb and has an elongation of 0.009 in. The modulus of elasticity of the material is most nearly:
Answer:
E = 8.83 kips
Explanation:
First, we determine the stress on the rod:
\(\sigma = \frac{F}{A}\\\\\)
where,
σ = stress = ?
F = Force Applied = 1300 lb
A = Cross-sectional Area of rod = 0.5\(\pi \frac{d^2}{4} = \pi \frac{(0.5\ in)^2}{4} = 0.1963\ in^2\)
Therefore,
\(\sigma = \frac{1300\ lb}{0.1963\ in^2} \\\\\sigma = 6.62\ kips\)
Now, we determine the strain:
\(strain = \epsilon = \frac{elongation}{original\ length} \\\\\epsilon = \frac{0.009\ in}{12\ in}\\\\\epsilon = 7.5\ x\ 10^{-4}\)
Now, the modulus of elasticity (E) is given as:
\(E = \frac{\sigma}{\epsilon}\\\\E = \frac{6.62\ kips}{7.5\ x\ 10^{-4}}\)
E = 8.83 kips