define sheer stress
Answers
Every one deals with stress. Stress or anxiety is usually when your scared or anxious because you know you could have done better then what you did. For example on a test, you could be scared about what grade you get. You can also have stress when you feel something bad is going to happen.
Answer:
it is the component of stress coplanar with a material cross section. It arises from the shear force, the component of force vector parallel to the material cross section
Explanation:
hope this helps and have a good day :-)
Related Questions
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PUZZLE 92
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Fiil the square with numbers with albhabets
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Answer:
Explanation:
I'm not 100% this is what you want, but here it is:
2
3
13
8
11
A
13
what could happen if the engine was uncowled during the starting and operating procedures
Answers
If an engine fails during rollout or just before takeoff, immediately shut both throttles and land the aircraft safely. Before reaching a safe single engine speed right away after takeoff, drop your nose to increase velocity.
What is the engine starting procedure?Closing the throttle, turning off the fuel pump, setting the mixture control to idle cutoff, and simply cranking the engine is the most reliable hot start method I've found.
What is the procedure for engine failure?If an engine fails during rollout or just before takeoff, immediately shut both throttles and land the aircraft safely. Before reaching a safe single engine speed right away after takeoff, drop your nose to increase velocity. If you are unable to climb, close both throttles and land straight ahead.
What happens if engine fails during take off?The typical practice for the majority of aircraft would be to abandon takeoff if an engine failed during takeoff. In small aircraft, the pilot should turn the throttles down to idle, activate the speed brakes (if provided), and apply the brakes as needed if the engine fails before VR (Rotation Speed).
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Ground effect is felt at a height that is equal to the plane's wingspan.
True or False
Answers
Answer:
True
Explanation:
a rain-slick surface
Answers
A rain-slick surface is A: "most slippery at the beginning of a rain".
Rain slippery surfaces or roads can pose hazards to driving. Therefore precautions are necessary to be taken. These are some ways through which accidents on a rain-slick surface can be avoided:
Reduce speed because it takes longer to stop the vehicles on a slippery surface.Avoid sudden moves because they can cause a skid on slippery roads.Use both brakes because, on wet surfaces, the front brake is more effective.Avoid traveling via the worst slippery areas."
Complete question
a rain-slick surface:
A: most slippery at the beginning of a rain
B: most slippery after a rain
"
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Which part of a machine control unit interacts with the machine tools through electric signals?=]
A machine control unit is the electronic hardware that stores information and controls the machine tools. This unit contains a data processing unit that stores and manipulates data, and a ___________ that interacts with the machine tools through electrical signals.
Answers
Answer:
control loop unit
Explanation:
Edmentum/Plato
the organizational strategy should ideally _____ the is strategy.
Answers
The organizational strategy should ideally IS (Information Systems ) the is strategy.
Alignment between these two strategies is crucial for the overall success and effectiveness of an organization.
The IS strategy refers to the plan and direction of how information systems and technology are utilized within an organization to achieve its objectives. It encompasses the deployment, management, and utilization of technology to support business processes, enhance decision-making, improve efficiency, and gain a competitive advantage.
On the other hand, the organizational strategy defines the long-term goals and objectives of the organization, including its vision, mission, and overall direction. It outlines how the organization plans to achieve its goals, compete in the market, and create value for its stakeholders.
For optimal performance, it is important that the organizational strategy and the IS strategy are closely aligned. When they are not in sync, it can lead to inefficiencies, misallocation of resources, and a lack of integration between business processes and technology.
Alignment between these two strategies ensures that information systems and technology are strategically deployed to support the organization's goals and objectives. It enables the effective use of technology to enhance operations, streamline processes, improve decision-making, and ultimately drive organizational success.
When the organizational strategy and the IS strategy are aligned, organizations can leverage technology to gain a competitive advantage, respond quickly to market changes, innovate, and adapt to evolving customer needs. It fosters a cohesive and integrated approach, where technology becomes an enabler and catalyst for achieving strategic objectives.
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Tech A says that multi-plate clutches must have a specified amount of clearance when they are installed. Tech B says that there should be no clearance when they are installed because the clutch would slip. Who is correct?
Answers
The person who is correct based on the assertions made about the multi-plate clutch is:
Technician AMulti-plate ClutchThis refers to the machinery which makes use of plates so that there would be efficient transmission between the engine shaft and the transmission shaft.
WIth this in mind, we can see that they must have specific amount of clearance when they are installed so that they can effectively function in the automobile.
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15. what is the turns ratio of a transformer having 250 primary turns and 1,000 secondary turns? what is the turns ratio when the primary winding has 400 turns and the secondary winding has 100 turns?
Answers
What is ratio?
A ratio indicates the number of times one number contains another. For example, if a dish of fruit contains eight oranges as well as six lemons, the orange-to-lemon ratio is eight to six. Similarly, the proportion of lemons to oranges is 6:8 (or 3:4), while the proportion of oranges to overall fruit is 8:14. (or 4:7). The numbers in a ratio can be any quantity, such as a count of people or things, or measurements of lengths, weights, time, and so on. Both numbers must be positive in most cases.
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The number of bits on a transmission line that are in the process of actively being transmitted (i.e.,the number of bits that have been transmitted but have not yet been received) is referred to as the bit length of the line. Plot the line distance versus the transmission speed for a bit length of 1000 bits.Assume a propagation velocity of 2 X 108 m/s.
Answers
Answer:
The plotted diagram of line distance versus the transmission speed is uploaded below.
Explanation:
Given the data in the question;
Bit length B = 1000 bits
propagation velocity V = 2 × 10⁸ m/s
now, we know that the bit length of a link is expressed as;
B = R × d/V
where V is propagation velocity
d is the distance
R is the transmission speed
B is bit length
so we substitute
1000 = R × d/(2 × 10⁸)
1000 = Rd/(2 × 10⁸)
2 × 10¹¹ = Rd
R = 2 × 10¹¹ / d
R = 2E+11
Hence, we plot the transmission speed versus line distance; as shown in the image BELOW.
From the plot, if the transmission speed increases, the distances between stations decreases and vise versa.
Hence, both are inversely proportional.
The graph plot of line distance versus the transmission speed for a bit length of 1000 bits is; plotted below with Lν = 2 × 10¹¹ m/s
What is the number of bits on a transmission line?
We are given;
Bit length; B = 1000 bits
Propagation velocity; V = 2 × 10⁸ m/s
Formula for bit length of a link is expressed as;
B = ν × L/V
where;
V is propagation velocity
L is the distance
ν is the transmission speed
B is bit length
Thus, plugging in the relevant values gives;
1000 = ν × L/(2 × 10⁸)
Thus;
Lν = 1000 × 2 × 10⁸
Lν = 2 × 10¹¹ m/s
Thus, find the attached image of a graph showing the line distance versus the transmission speed for a bit length of 1000 bits.
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A work cell is currently operated 2000 hr/yr by a human worker who is paid an hourly rate of $23.00, which includes applicable overhead costs. One work unit is produced in a cycle time of 4.8 min. Management would like to increase output to meet increasing demand and a robot cell is being considered as a replacement for the present manual cell. The cycle time of the proposed cell would be reduced to 4.0 min. The installed cost of the robot plus supporting equipment is $120,000. Power and other utilities to operate the robot will be $0.30/hr, and annual maintenance costs are $2500. Determine:
a. the number of parts produced annually by the manually operated cell.
b. cost per part produced.
c. how does the cost per part of the robot cell compare with your answer in part (b), given a 4-year service life, 10% rate of return, and no salvage value.
Answers
Answer:
a) 25000 pcs/yr
b) cost per part produced is $ 1.84 per pc
c) Cpc = $ 1.365 per pcs
Explanation:
a)
the relation to calculate the number of parts produced annually by manual process is;
Q = Hw / Tc
Hw is the hourly rate ( 2000hr/yr) and Tc is the cycle time ( 4.8 min)
so we substitute
Q = (2000 × 60) / 4.8
= 120000 / 4.8
= 25000 pcs/yr
b)
cost per part produced
the relation to calculate the cost per part produced is expressed as;
Cpc = $23(Hw) / Q
Cpc is the cost per part produced
so we substitute
Cpc = $23(2000) / 25000
= 46000 / 25000
= $ 1.8 per pc
therefore cost per part produced is $ 1.84 per pc
c)
for the robot cell, at a service life of 4 years and a 10% rate of return , the factor is expressed as;
f = [r(1 + r)^t] / [((1 + r)^t ) - 1 ]
our rate r = 10% = 0.1 and our t = 4
so we substitute
f = [0.1 (1 + 0.1)^4] / [((1 + 0.1)^4 ) - 1 ]
f = 0.14641 / 0.4641
f = 0.3155
now we find the total cost
TC = 120000(0.3155) + 2000(0.3) + 2500
TC = $ 40,960
next we find the parts produced annually
Q = (2000 × 60) / 4
Q = 120,000 / 4
Q = 30000 pcs/yr
finally we find the cost per part produced;
Cpc = TC / Q
we substitute
Cpc = 40,960 / 30000
Cpc = $ 1.365 per pcs
In a water jet macning, the mass flow rate of water is found to be 0.05 kg/s. consider water density as 996 kg/m and 0.02 cm is the diameter of the hole from which water jet comes out. neglect all the losses and potential head differences. determine the minimum pressure at which water suppling pump must operate.
Answers
The minimum pressure at which the water-supplying pump must operate is approximately 2.45 x 10⁶ Pa or 2450 bar.
Solution:To calculate the minimum pressure at which the water-supplying pump must operate, we need to use the formula for the volumetric flow rate of a fluid:
Q = A * v
where,
Q =the flow rate
A = the cross-sectional area of the hole
v = the velocity of the fluid.
We can use this formula to determine the velocity of the water, and then use the Bernoulli equation to determine the minimum pressure.
From the question:
ṁ=0.05 kg/s
ρ= 996 kg/m
d= 0.02 cm
Calculating the area of the hole:
A = (π/4) * (d²)
where,
d is the diameter of the hole, and pi is approximately 3.14.
d = 0.02 cm = 0.0002 m
A = (3.14/4) * (0.0002 m)² = 1.57 x 10⁻⁷ m²
Using the mass flow rate to calculate the velocity of water:
Q = ṁ / ρ
where,
Q = the volumetric flow rate
ṁ = the mass flow rate
ρ = the density of water.
Q = (0.05 kg/s) / (996 kg/m³)
Q = 5 x 10⁻⁵ m³/s
Using the area of the hole to find the velocity of water
v = Q / A
v = (5 x 10⁻⁵ m³/s) / (1.57 x 10⁻⁷m²)
v = 318.8 m/s
Using the Bernoulli equation to find the pressure:
P = Patm + (1/2) * ρ * v²
where,
P = the pressure
Patm = the atmospheric pressure
ρ =the density of water
v = the velocity of the water.
P = Patm + (1/2) * (996 kg/m³) * (318.8 m/s)²
Hence, the minimum pressure at which the water-supplying pump must operate is approximately 2.45 x 10⁶ Pa or 2450 bar.
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1. A bar is 500 mm long and is stretched to 505 mm with a force of 50 kN. The bar is 10 mm diameter. Calculate the stress and strain. The material has remained within the elastic limit. Determine the modulus of elasticity.
Answers
Answer:
The modulus of elasticity is 63760 MPa.
How would the exterior appearance of an aeroplane change, when trimming for speedincrease?A) The elevator is deflected further downward by means of a movable horizontal stabiliser.B) Elevator deflection is increased further downward by an upward deflected trim tab.C) The exterior appearance of the aeroplane will not change.D) The elevator is deflected further up by a downward deflected trim tab.
Answers
When trimming an airplane for an increase in speed, the exterior appearance of the airplane can change depending on the method used for the trim.
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technician a says that the injector supply lines must be replaced if they are removed. technician b says that the supply lines can be reused. which technician is correct?
Answers
The injector supply lines must be replaced if they are removed. So, what is said by technician A is correct.
Injector refers to a device that is used to inject liquid fuel into an internal-combustion engine. The injector can also used for describing an apparatus to injcet feed water into a boiler. The injector supply lines must be replaced if they are removed. The injector can be used as a spray nozzle to break up the fuel into a fine spray - it doesn't always control the fuel flow. There are three general kind of injection systems on the market:
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why the power factor is Low in no load test in induction motor ?
Answers
The reason for low power factor in no load test in induction motor is high rotor reactance at lower loading since the rotor reactance value gets decreased with increased loading on induction motor
Usually at no load, the Cosine of the phase angle between the stator current(I1) and the stator applied voltage(V1) is the power factor of an induction motor.
In conclusion, the reason for low power factor in no load test in induction motor is high rotor reactance at lower loading since the rotor reactance value gets decreased with increased loading on induction motor
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a commercial refrigerator with r-134a as the working fluid is used to keep the refrigerated space at -35 c by rejecting waste heat to cooling water that enters the condenser at 18 c at a rate of 0.25 kg/s and leaves at 26 c. the refrigerant enters the condenser at 1.2 mpa and 50 c and leaves at the same pressure subcooled by 6 c. if the compressor consumes 3.3 kw of power , determine (a) the mass flow rate of the refrigerant, b) the refrigerant load, c) the cop, and d) the minimum power input to the compressor for the same refrigeration load.
Answers
At 1.2mpa pressure and 50c
What is pressure?
By pressing a knife against some fruit, one can see a straightforward illustration of pressure. The surface won't be cut if you press the flat part of the knife against the fruit. The force is dispersed over a wide area (low pressure).
a)Mass flow rate of the refrigerant
Therefore h1= condenser inlet enthalpy =278.28KJ/Kg
saturation temperature at 1.2mpa is 46.29C
Therefore the temperature of the condenser
T2 = 46.29C - 5
T2 = 41.29C
Now,
d)power consumed by compressor W = 3.3KW
Q4 = QL + w = Q4
QL = mR(h1-h2)-W
= 0.0498 x (278.26 - 110.19)-3.3
=5.074KW
Hence refrigerator load is 5.74Kg
(COP)r = 238/53
(Cop) = 4.490
Therefore the above values are the (a) mass flow rate of the refrigerant, b) the refrigerant load, c) the cop, and d) the minimum power input to the compressor for the same refrigeration load.
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The peak voltage of a 240 VRMS sine wave is approximately 1. 120v 2. 340v 3. 170v 4.300v I believe it would be 170v if im correct? Can you help me out
Answers
The peak voltage of a sine wave is calculated as the RMS voltage multiplied by the square root of 2. Therefore, the peak voltage of a 240 VRMS sine wave is approximately 340 volts. So, your answer is option 2, 340v.
What is the explanation for the above response?The RMS voltage (VRMS) of a sine wave is the "root-mean-square" average value of the waveform. It is calculated by taking the square root of the mean of the squares of the instantaneous voltage values over one cycle of the waveform.
For a sine wave, the peak voltage (Vp) is the highest voltage value that the waveform reaches, and it occurs at 90 degrees or pi/2 radians (a quarter cycle) after the zero crossing.
The relationship between VRMS and Vp for a sine wave is given by the formula:
Vp = VRMS x sqrt(2)
This formula shows that the peak voltage of a sine wave is equal to the RMS voltage multiplied by the square root of 2.
Therefore, in the case of a 240 VRMS sine wave, the peak voltage would be:
Vp = VRMS x sqrt(2) = 240 x 1.414 = 339.36 volts
Rounding this to the nearest whole number, we get the answer of 340 volts, which is option 2.
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1.
Explain why an n-type semiconductor material is
electrically neutral and not negatively charged.
Answers
Answer:
It is important because the donor introduces a free electron to the conduction band while leaving behind a fixed positively charged ion, thus maintaining the overall charge neutrality.
create a style rule for the fieldset and input elements that sets the bottom margin to 2%. create a style rule for the fieldset legend that sets the font-size to 1.25em and makes the font bold. create a style rule for the label that sets the display to block and sets padding-top to 3%. create a style rule for the btn class selector that removes the border, sets the top and bottom margin to zero and the left and right margin to auto, sets the display to a block, sets the padding to 5%, sets the background-color to 003399, sets the font-size to 1.25em, sets the border-radius to 10px, and sets the color to white (fff).
Answers
Body's background color is specified by the following style: linear-gradient(to top right, 0%, 100%) body font family: Geneva, Arial, sans-serif; no-repeat fixed center;.
/* Style for body specifies background color */ body background: linear-gradient (to top right, 0%, 100%); no-repeat fixed center; font-family: Geneva, Arial, sans-serif;
/* The container element's style/
width of #container is 90%.
margin: 0 auto; fieldset legend's font-size and weight are bold; label's display is block; padding-top is 3%; input's margin-bottom is 2%; and fieldset legend's margin-bottom is 2%.
.btn displays as a block with the following properties: background color of #003399, foreground color of #fff, font size of 1.25em, margin of 0 auto, padding of 5%, border of none, and border-radius of 10px.
/* The footer element's style /*
footer.9em font size, middle text alignment.
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A coil having resistance of 7 ohms and inductance of 31.8 mh is connected to 230v,50hz supply.calculate 1. The circuit current 2.the phase angle, 3.power factor, 4 the power consumed
Answers
(1) The current in the circuit is 18.87 A,
(2) The phase angle is 54.97°
(3) The power factor is 0.574
(4) The power consumed is 2491.2 W
(1) To calculate the current in the circuit, first, we need to find the overall impedance of the circuit.
We can calculate the overall impendence of the circuit using the formula below.
Z = √[R²+(2πfL)²]........................ Equation 1Where:
R = resistance of the coilf = FrequencyL = Inductance of the coilZ = Overall impedance of the circuitFrom the question,
Given:
R = 7 ohmsL = 31.8 mH = 0.0318 Hf = 50 Hzπ = 3.14
Substitute these values into equation 1
Z = √[7²+(2×3.14×50×0.0318)²]Z = √(49+99.7)Z = √(148.7)Z = 12.19 ohms.Therefore we use the formula below to calculate the current in the circuit.
I = V/Z.................. Equation 2Where:
V = VoltageI = current in the circuit.Given:
V = 230 V.Substitute into equation 2
I = 230/12.19I = 18.87 A(2) To calculate the phase angle, we use the formula below.
∅ = tan⁻¹(2πfL/R)............... Equation 3Where:
∅ = Phase angle.
Substitute into equation 3
(3) To calculate the power factor, we use the formula below.
pf = cos∅............ Equation 4Where:
pf = power factor.Substitute the value of ∅ into equation 4
pf = cos(54.97°)pf = 0.574.
(4) And Finally to calculate the power consumed we use the formula below.
P = V×I×pf................ Equation 5Where:
P = The power consumedSubstitute the values into equation 5
P = 230(18.87)(0.574)P = 2491.22 W
Hence, (1) The current in the circuit is 18.87 A, (2) The phase angle is 54.97° (3) The power factor is 0.574 (4) The power consumed is 2491.2 W
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Which of the following is not the feature of modern control system?
a)Quick response
b)Accuracy
c)Correct power level
d)No oscillation
Answers
It should be noted that when we talk about internal controls, we really just mean the rules that an organization needs to follow in order to run efficiently.
What makes a good effective?sufficient to accomplish a task; producing the desired or anticipated result: Techniques for teaching that are effective; calm procedures. currently in force or operation; active: At midnight, the statute becomes effective. A strong photograph creates a vivid or enduring memory.
What ways are they effective ?Effectiveness frequently refers to things like laws, treatments, cases, and procedures that succeed in achieving their objectives. Efficacy can also be awarded to individuals when they achieve their objectives, but this definition is more common.
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help please thank you
Answers
The system is operated at a feed rate of 15 × 10^(-3) m^3/h with an initial glucose concentration of 10 kg/m^3.
How to explain the informationThe steady-state mass balance for the reactor can be written as:
F = QX + Qs
where F is the feed rate, QX is the volumetric flow rate of cells, and Qs is the volumetric flow rate of glucose.
At steady-state, QX and Qs are constant. Therefore, we can write:
QX = F - Qs
In this case, the system is operated at a feed rate of 15 × 10^(-3) m^3/h with an initial glucose concentration of 10 kg/m^3.
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There are two types of check-in counters in use,exclusive and public (or "Shared Use)."Shared Use"systems are changing the way airports operate. Please describe the content of the "Shared Use" system, and talk about the advantages of"Shared Use"system and the possibility of final realization from your experience at the airport.
Answers
Answer:
Exclusive and public check-in counters are the two types of check-in counters used at airports. Exclusive check-in counters are usually used by more luxurious and expensive airlines, while public or "shared use" check-in counters are used by more affordable airlines. These public check-in counters are usually located in the same airport terminal area and can be used by all airlines.
The "shared use" system is changing the way airports operate by allowing passengers to use the same check-in counters for all airlines. With this system, passengers can choose which check-in counters are available and closest to their boarding gate.
The advantage of the "shared use" system is that passengers can choose which check-in counters are available and closest to their boarding gate. In addition, the system also allows passengers to avoid long queues at certain airline check-in counters.
The possibility of the final realization of your experience at the airport depends on many factors such as your arrival time at the airport, the number of other passengers, and the availability of staff and facilities at that airport. However, by using a "shared use" system, you can speed up your check-in process and avoid long queues at selected airline check-in counters.
Explanation:
I hope this helps
Answer the multiple-choice questions. A. Illuminance is affected by a) Distance. b) Flux. c) Area. d) All of the above. B. The unit of efficacy is a) Lumen/Watts. C. b) Output lumen/Input lumen. c) Lux/Watts. d) None of the above. Luminous intensity can be calculated from a) flux/Area. b) flux/Steradian. c) flux/power. d) None of the above.
Answers
A) d) All of the above. B) The unit of efficacy is a) Lumen/Watts. and C) The luminous intensity is b) flux/Steradian.
Illuminance is the measure of the amount of light that falls on a surface per unit area. It is affected by distance, flux, and area. Distance plays a role in illuminance because the further away a light source is, the less illuminance it will produce on a surface. Flux, which is the total amount of light emitted by a source, also affects illuminance because the more flux a source produces, the more illuminance it will generate. Finally, area is a factor in illuminance because the larger the surface area that the light falls on, the lower the illuminance will be.
B. The correct answer to the multiple-choice question about the unit of efficacy is a) Lumen/Watts. Efficacy is the measure of how efficient a light source is at producing visible light. It is calculated by dividing the total amount of light output (in lumens) by the power consumed (in watts). Therefore, the unit of efficacy is lumen/watt.
C. The correct answer to the multiple-choice question about calculating luminous intensity is b) flux/Steradian. Luminous intensity is the measure of the amount of light emitted in a particular direction. It is calculated by dividing the flux (total amount of light emitted by the source) by the solid angle in which the light is emitted (measured in steradians). Therefore, the formula for calculating luminous intensity is flux/steradian.
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Assume you are an observer standing at a point along a three-lane roadway. All vehicles in lane 1 are traveling at 30mph, all vehicles in lane 2 are traveling at 45mph, and all vehicles in lane 3 are traveling at 60mph. There is also a constant spacing of 0.5mile between vehicles. If you collect spot speed data for all vehicles as they cross your observation point, for 30 minutes, what will be the time-mean speed and space-mean speed for this traffic stream?
Answers
In this scenario, vehicles in three lanes are traveling at different speeds with a constant spacing between them.
By collecting spot speed data for 30 minutes as vehicles cross a specific observation point, we can calculate the time-mean speed and space-mean speed for the traffic stream.
To calculate the time-mean speed, we need to determine the average speed of all vehicles over the given time period. Since the speeds in each lane are constant, the time-mean speed will be the average of the speeds in each lane. In this case, lane 1 has vehicles traveling at 30 mph, lane 2 at 45 mph, and lane 3 at 60 mph. Thus, the time-mean speed can be calculated by taking the average of these speeds: (30 + 45 + 60) / 3 = 45 mph.
To calculate the space-mean speed, we need to consider the average speed of vehicles at a specific location along the roadway. In this scenario, the spacing between vehicles in each lane is constant at 0.5 mile. Therefore, the space-mean speed can be calculated by dividing the total distance traveled by all vehicles in the given time period by the total time taken. Since the vehicles maintain a constant speed, the total distance traveled will be the same as the time-mean speed. Hence, the space-mean speed in this case will also be 45 mph.
In summary, for the given traffic stream with different speeds in each lane and a constant spacing between vehicles, the time-mean speed and space-mean speed are both equal to 45 mph.
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Which of the following statements are true about staying safe while
working around all caught-in caught-between hazards?
Select two answers that apply.
What you should do changes based on hazards you’re exposed to.
You should be aware of any hazards that are present
You should be aware of the only hazards indicated as critical by management
What you should do is the exact same no matter the hazard
Answers
Answer:
What you should do changes based on the hazards you're exposed to.
You should be aware of any hazards that are present.
SAHARA
Jeep
WRANGLES
G
Answers
Answer:
lol what
smmsdnndnsnsnnd
The message signal m(t) has |m(t)|max = 1 and Sm = 0.2. Determine the values of ST and required for Psb = 10 W in the following cases.
(1) DSB (2) AM with μ = 1
See the attached, please.
Answers
It is written that the message signal m(t) has Im(t)lmax = 1 and Sm = 0.2. The values of ST and required for Psb = 10 W in the following cases. (1) DSB (2) AM with u=1. We can use the formula for average power of a modulated signal to determine the values.
What is the solution?The message signal m(t) has Im(t)lmax = 1 and Sm = 0.2. The values of ST and required for Psb = 10 W in the following cases. (1) DSB (2) AM with u=1. We can use the formula for average power of a modulated signal to determine the values of and required for where is the average power of the modulated signal, is the power spectral density of the message signal, and A is the amplitude of the modulating signal.
The steps are given in the attachments below:
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Three single-phase loads in parallel are supplied from a 1400V (RMS), 60 Hz supply. The loads are as follows: Load 1: Inductive load: 125 kVA, 0.28 power factor Load 2: Capacitive load: 10 kW, 40 kVAR Load 3: Resistive load: 15 kW Find the total kW, kVAR, kVA, and supply power factor. (5 points) Find the capacitive correction (in kVARs) required to improve the power factor to 0.8 and calculate the supply current with this correction in place. (10 points) What is the least current that can service these three loads and how much compensation would it require
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Answer:
The answer is below
Explanation:
\(\theta_1=cos^{-1}0.28=73.74^o\ lagging\\\\S_1=125\angle 73.74^o=35\ kW+j120\ kVAR\\\\S_2=10\ kW-j40\ kVAR\\\\S_3=15\ kW\)
Total power = P = 35 kW + 10 kW + 15 kW = 60 kW
Total kVAR = 120 kVAR - 40 kVAR = 80 kVAR
\(Total\ apparent \ power =S= S_1+S_2+S_3=(35+j120)+(10-j40)+(15)\\\\S=60\ kW+j80\ kVAR=100\angle 53.13^o\\\\Current(I)=\frac{S^*}{V^*} \frac{100000\angle -53.13^o}{1400\angle0}=71.43\angle-53.13^o\\ \\Power\ factor (PF)=cos(53.13)=0.6\ lagging\\\\The \ new\ power\ factor\ is\ to \ be\ 0.8[cos^{-1}0.8=36.87^o], hence\ since\ the\ total\ \\real\ power(P)= 60\ kW, the\ capacitor\ kVAR(Q_c)\ is:\\\\Q_c=60tan(53.13)-60tan(36.87)=80-45=35\ kVAR\\\\\)
\(C=\frac{Q_c}{wV^2} =\frac{35000\ VAR}{2\pi*60\ Hz*1400\ V}=47.38\ \mu f\)
New current (I') = \(\frac{S'^*}{V^*}=\frac{60000-j45000}{1400}=53.57\angle-36.87^o\)
Current reduce from 71.43 A to 53.57 A
Technician A says that if drum brake shoes become saturated with gear oil or grease, they should be replaced. Technician B says that drum brake shoes can be cleaned and reused if the lining becomes contaminated with gear oil or grease. Who is correct
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Technician A is wrong and Technician B words that drum brake shoes need to be cleaned and reused when lining is stained with gear oil or grease is correct.
Can contaminated brake shoes be reused?In a situation when they are said to be soaked in anything that is bad then one can be said to not reuse them but in other cases, it can be reused.
Note that Technician A is wrong and Technician B words that drum brake shoes need to be cleaned and reused when lining is stained with gear oil or grease is correct.
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