A single phase, 50-KVA, 2400-240-volt, 60 Hz distribution transformer has the following parameters: •
Resistance of the 2400-volt winding Ri=0.75 ohm
Resistance of the 240-volt winding R=0.0075 ohm
Leakage reactance of the 2400-volt winding X:=1 ohm
Leakage reactance of the 240-volt winding X2=0.01 ohm
Core loss resistance on the 2400 side Rc=733.5 ohms
Magnetizing reactance on the 2400 side X=4890 ohms
a. Draw the equivalent circuit referred to the high voltage side and referred to the low- voltage side. Label the impedances numerically.
b. The transformer is used as a step-down transformer at the load end of a feeder having impedance of (0.5+j2.0) ohms. Determine the voltage V. at the ending end of the feeder when the transformer delivers rated load at rated secondary voltage and 0.8 laggin power factor. Neglect the "exciting current" l. of the transformer (this is the current into the parallel Rc/jXm combination), which is another way of saying that you should use what we called in class the "approximate circuit #2).
Answers
Answer:
B) voltage at the sending end of the feeder = 2483.66 v
Explanation:
attached below is the the equivalent circuits and the remaining solution for option A
B) voltage = 2400 v
I = \(\frac{50*10^3}{2400}\) = 20.83 A
calculate voltage at sending end ( Vs )
Vs = 2400 + 20.83 ∠ -cos^-1 (0.8) ( 0.75*2 + 0.5 + j 2 + j2 )
hence Vs = 2483.66 ∠ 0.961
therefore voltage at the sending end = 2483.66 v
Related Questions
What forced induction device is more efficient?
A. Turbo Charger
B. Supercharger
C. Centrifugal Supercharger
D. Procharger
Answers
Answer:
A
Explanation:
Answer:
a
Explanation:
A car makes a hissing noise each time the A/C system and engine are turned off. Technician A says that the noise is caused by a refrigerant leak. Technician B says that the noise is caused by equalization of system pressures. Who is correct?
Answers
Answer:
It's equalization of the system
Explanation: If there was a leak it would likely leak all the time even if the car was turned off. Plus, a system leak bad enough to hear would drain the system of refrigerant very quickly and would no longer cool.
Ethanol blended with gasoline can be used to power a "flex-fueled" car. One particular blend that is gaining in popularity is E85, which is 85% ethanol and 15% gasoline. E85 is 80% cleaner burning than gasoline alone, and it reduces our dependency on foreign oil. But a flex-fueled car costs $ more than a conventional gasoline-fueled car. Additionally, E85 fuel gets % less miles per gallon than a conventional automobile. Consider a 100% gasoline-fueled car that averages miles per gallon. The E85-fueled car will average about miles per gallon. If either car will be driven miles before being traded in, how much will the E85 fuel have to cost (per gallon) to make the flex-fueled car as economically attractive as a conventional gasoline-fueled car? Gasoline costs $ per gallon. Work this problem without considering the time value of money.
Answers
Answer: hello your question is poorly written below is the complete question
Ethanol blended with gasoline can be used to power a flex-fueled car. One particular blend that is gaining in popularity is E85 , which is 85% ethanol and 15% gasoline. E85 is 80% cleaner burning than gasoline alone, and it reduces our dependency on foreign oil. But a flex-fueled car costs $1,000 more than a conventional gasoline-fueled car. Additionally, E85 fuel gets 10% less miles per gallon than a conventional automobile. Consider a 100% gasoline -fueled car that averages 30 miles per gallon. The E85-fueled car will average about 27 miles per gallon. If either car will be driven 81000 miles before being traded in, how much will the E85 fuel have to cost (per gallon) to make the flex-fueled car as economically attractive as a conventional gasoline-fueled car? Gasoline costs $3.89 per gallon. Work this problem without considering the time value of money
answer :
$3.17
Explanation:
Determine how much E85 fuel have to cost
Fuel needed by 100% gasoline fueled car
= 81,000 miles / 30 = 2700 gallons
Fueled needed by E85 car
= 81,000 miles / 27 = 3000 gallons
next step : use the relation below
[ (Additional cost of flex fuel car) + (flex fuel consumption * cost of flex fuel per gallon( x ) ) ] = [ Gasoline consumption * cost of gasoline per gallon ]
= 1000 + 3000x = 2700 * 3.89
= 1000 + 3000x = 10503
∴ x = 9503 / 3000 = $3.17 per gallon
1 poli The H screw on this carburetor is for the setting idlle mixture of fuel and air adjusting the high speed fuel air mixture O adjusting the high speed setting of the engine adjusting the throttle position of the carburetor
Answers
The H screw on a carburetor is used for adjusting the high-speed fuel-air mixture of the engine. This screw is responsible for controlling the amount of fuel and air that enters the engine when it is running at a high speed.
It is important to set this screw correctly in order to ensure optimal engine performance and prevent damage to the engine. The idle mixture is adjusted using a different screw, typically labeled as the L screw. The throttle position of the carburetor is also important to consider when adjusting the engine speed. A carburetor is a device that mixes air and fuel in the proper ratio for combustion in an internal combustion engine. It is used in older gasoline-powered vehicles and small engines such as lawnmowers, chainsaws, and motorcycles. The carburetor works by regulating the flow of air and fuel into the engine. It consists of a series of tubes, valves, and chambers that control the amount of fuel and air that enter the engine. Carburetors have been largely replaced by fuel injection systems, which are more efficient and reliable, but they still have some applications in small engines and vintage vehicles. Carburetors require regular maintenance and tuning to ensure proper engine performance and fuel efficiency.
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What is the Bernoulli formula?
Answers
Answer:
P1+1/2pv2/1+pgh1=P2+1/2pv2/2+pgh2
el protozoos es del reino protista?
Answers
Answer: Si (Yes)
Explanation:
Answer:
Protozoario o protozoo es un organismo unicelular y eucariota (con núcleo celular definido) perteneciente al Reino protista. Los protozoarios se encuentran junto con los protófitos o algas simples, generalmente acuáticas, dentro del Reino protista o también denominado Reino protoctista.
Explanation:
Life cycle assessments are used by various industries to identify and evaluate the total energy impacts of their products and services.
True or False?
Answers
Answer:
True.
Explanation:
A product life cycle can be defined as the stages or phases that a particular product passes through, from the period it was introduced into the market to the period when it is eventually removed from the market.
Generally, there are four (4) stages in the product-life cycle;
1. Introduction.
2. Growth.
3. Maturity.
4. Decline.
Life cycle assessment (LCA) also known as life cycle analysis can be defined as an environmental management technique which is typically used by industries to assess, monitor and analyze the impact of the various stages of the life-cycle of their products, systems, processes or activities and services on the environment i.e the cradle to grave impacts.
Generally, life cycle assessments requires a thorough evaluation of the raw materials and energy that are being used in the manufacturing process of a product or service, as well as determining the various emissions into the environment respectively.
For example, in the manufacturing process of a product, life cycle assessment evaluates the impact of the product from raw material extraction (cradle) to production (finished product), distribution, use, and the disposal of the product (grave).
Hence, life cycle assessments are used by various industries to identify and evaluate the total energy impacts of their products and services.
Two gray bodies: Body 1 at 200oC and Body 2 at 100oC with emissivities of 0.6 and 0.8 respectively.
Required: The net heat transfer rate by radiation from Body 1 to Body 2 per m2, if: Bodies 1 and 2 are parallel disks each with 4 cm radius and 5 cm apart.
Answers
The net heat transfer rate by radiation from Body 1 to Body 2 per square meter is approximately 10.35 W/m^2.
The problem concerns the radiation heat transfer between two parallel disks. The disks have radii of 4 cm and emissivities of 0.6 and 0.8. They are maintained at temperatures of 200°C and 100°C respectively, with a distance of 5 cm between them. The objective is to determine the net heat transfer rate per square meter from Body 1 to Body 2, assuming no convective heat transfer occurs between the disks.
To calculate the heat transfer rate by radiation, the Stefan-Boltzmann law is applied:
q'' = σA1A2 (T1^4 - T2^4) / πD^2
Where:
q'' is the heat transfer rate by radiation
σ is the Stefan-Boltzmann constant (5.67 x 10^-8 W/m^2-K^4)
A1 and A2 are the areas of the two disks
T1 and T2 are the temperatures of the two disks
D is the distance between the two disks
From the equation, it is evident that the heat transfer rate by radiation is directly proportional to the area of the disks and the temperature difference between them, while inversely proportional to the square of the distance between them.
Calculating the area of each disk, A, we find A = πr^2 = 3.14 x 4^2 / 10000 = 0.000502 m^2.
Substituting the given values into the Stefan-Boltzmann law, we obtain:
q'' = 5.67 x 10^-8 x 0.000502 x 0.000502 x (473.15^4 - 373.15^4) / (π x 0.05^2)
≈ 10.35 W/m^2
Therefore, the net heat transfer rate by radiation from Body 1 to Body 2 per square meter is approximately 10.35 W/m^2.
Answer: 10.35 W/m^2.
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The component has an exponentially distributed reliability with a mean of 2000 hours what is the probability that it will fail after 3000 hours?
Answers
Answer:
ABCDEFGHIJKLMNOPQRSTUVWXYZ
1) I love to swim. 2) A few years ago, my new year's resolution was to become a faster swimmer. 3) First, I started eating better to improve my overall health. 4) Then, I created a training program and started swimming five days a week. 5) I went to the pool at my local gym. 6) To measure my improvement, I tried to count my laps as I was swimming, but I always got distracted and lost track! 7) It made it very hard for me to know if I was getting faster. 8) This is a common experience for swimmers everywhere. 9) We need a wearable device to count laps, calories burned, and other real-time data. Summarey of the story
Answers
Where cables and nonmetallic raceways are installed parallel to framing members, the nearest outside surface of the cable or raceway shall be _____ the nearest edge of the framing member where nails or screws are likely to penetrate
Answers
Answer:
Where cables and nonmetallic raceways are installed parallel to framing members, the nearest outside surface of the cable or raceway shall be at least 1 1/4 inches from the nearest edge of the framing member where nails or screws are likely to penetrate. This is according to the National Electrical Code (NEC).
The two structural members, one of which is in tension and the other in compression, exert the indicated forces on joint o. determine the magnitude r of the resultant r of the two forces and the angle θ which r makes with the positive x axis (measured counterclockwise from the x axis).
Answers
\alpha = one hundred eighty - 30 - 70 = eighty degrees
R = sqrt(2^2 + 3^2 - 2(2)(three) cos(80)
R = three.30 kN, we can conclude now that the value of the ensuing of R is 3.30 kN
sin \beta /3 = sin(eighty)/three.304 = 63.4 stages
3.3 kN
180 + 33.4 = 213.4 degrees
63.4 - 30 = 33.4
You should always try to put out a fire if you see one, no matter how large it is.
Answers
Answer:
That's not true, if your house is burning down, leave. Let the firefighters do their jobs.
Explanation:
list five pieces of personal safety equipment which must be in everyday use in the workshop
Answers
Answer:
safety glasses, hearing protection, respirator, work gloves, and work boots.
Explanation:
please give brainliest!! <3
Christopher needs to order some new supplies for the restaurant where he works. The restaurant needs at least 775 spoons. There are currently 355 spoons. If each set on sale contains 10 spoons, write and solve an inequality which can be used to determine s, the number of sets of spoons Christopher could buy for the restaurant to have enough spoons.
Answers
The inequality which can be used to determine s, the number of sets of spoons Christopher could buy for the restaurant to have enough spoons is
35 + 10s ≥ 75
What is an inequality?An inequality is simply used to show the relationship between the expressions that aren't equal.
The restaurant needs at least 75 spoons and there are currently 35 spoons and each set on sale contains 10 spoon.
Let each set be represented as s. This will be illustrated as:
35 + (10 × s) ≥ 75
35 + 10s ≥ 75
Collect like terms
10s ≥ 75 - 30
10s ≥ 45
Divide
s ≥ 45/10
s ≥ 4.5
The restaurant must have at least 5 sets.
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The inequality that can be used to determine s, the number of sets of spoons Christopher could buy for the restaurant, is 35 + 10s ≥ 75.
What is inequality?Inequality is a term used to show two relations between two values that are not equal to each other.
Given, the restaurant needs at least 775 spoons. They have 355 spoons and each set contains 10 spoons.
Then the expression is ;
35 + (10 × s) ≥ 75
35 + 10s ≥ 75
Like terms are extracted
10s ≥ 75 - 30
10s ≥ 45
s ≥ 45/10
s ≥ 4.5
Thus, the inequality in the number of sets of spoons is 35 + 10s ≥ 75.
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As discussed in the text, one possible performance enhancement is to do a shift and add instead of an actual multiplication. Since 9 x 6, for example, can be written (2 x 2 x 2 + 1) x 6, we can calculate 9 x 6 by shift ing 6 to the left 3 times and then adding 6 to that result. Show the best way to calculate 0 x33 x 0 x 55 using shift s and adds/subtracts. Assume both inputs are 8-bit unsigned integers.
Answers
Answer:
The best way to calculate 0 x33 x 0 x 55 using shift s and adds/subtracts and assuming both inputs are 8-bit unsigned integers is attached below
We have a sinusoidal current i(t) that has an rms value of 20a, a period of 1ms, and reaches a positive peak at t=0.3ms.
write an expression for the current with time measured in seconds in the form i(t)=imcos(ωt+θ).
Answers
The expression for the current in the form i(t) = im*cos(ωt+θ) is: i(t) = 28.28*cos(2π x 1000 t + 0.942) A
To write the expression for the given sinusoidal current i(t) in the form i(t) = im*cos(ωt+θ), we need to determine the amplitude im, the angular frequency ω, and the phase angle θ.
The given current has an rms value of 20A, which means that the amplitude of the current is:
im = √2 * Irms = √2 * 20A = 28.28A (approx.)
The period of the current is 1ms, which corresponds to a frequency of:
f = 1 / T = 1 / (1ms) = 1 kHz
The angular frequency is:
ω = 2πf = 2π * 1 kHz = 2π x 1000 rad/s
The current reaches a positive peak at t = 0.3ms, which corresponds to a phase angle of:
θ = ωt - π/2 = (2π x 1000 rad/s) x (0.3 x 10^-3 s) - π/2 ≈ 0.942 radians
Therefore, the expression for the current in the form i(t) = im*cos(ωt+θ) is:
i(t) = 28.28*cos(2π x 1000 t + 0.942) A
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2.nbt.6 add up to four two-digit numbers using strategies based on place value and properties of operations.
Answers
We are going to solve this question with the help of "Toll Bridge Puzzle" using strategies based on place value and properties of operations.
The image below depicts bridges connecting islands. You must pay a toll in coins to cross a bridge. How can you get to the island marked in red if you start on the island marked in blue with 100 coins?
Step-By-Step Explanation:
This task is designed to assess the addition of four numbers as specified in the standard while remaining in a problem-solving context.
This task is intended to be instructional; however, due to the random nature of when the correct route is discovered, it is not suitable for assessment.
This puzzle works well as a physical re-enactment, with paper plates representing the islands and strings with papers attached representing the tolls.
The single digit numbers will often lead students to believe that the route must pass that way. They may also miss the "crossover" by using the central island, finding the 23 + 25 + 29 + 24 route but not the 32 + 15 + 40 + 38 route or the 32 + 15 + 29 + 24 route.
Technically, paths that run from right to left along some bridges (for example, 32 + 5 + 41 + 40 + 29 + 24) could also be considered. In this case, however, such paths can be ignored because students will find a cheap enough path by only investigating paths that run from left to right. One might be tempted to modify the problem by having the student start with 99 coins and ask if reaching the red island is possible. Such a change, however, would be inappropriate because a mathematically valid solution would require the student to consider all paths, including those that cross some bridges from right to left.
Solution:
32 + 15 + 29 + 24 = 100
Other possible routes:
23 + 51 + 3 + 24 = 101
23 + 25 + 29 + 24 = 101
23 + 25 + 40 + 38 = 126
32 + 15 + 40 + 38 = 116
32 + 5 + 41 + 38 = 116
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a large residential area has 1400 households withan average household income of $40,000, an averagehousehold size of 4.8, and, on average, 1.5 workingmembers. using the model described in example 8.2(assuming it was estimated using zonal averagesinstead of individual households), predict the changein the number of peak-hour social/recreational tripsif employment in the area increases by 25% andhousehold income by 10%.
Answers
delta_trips = delta_emp * B_emp + delta_hhinc * B_hhinc
where:
- delta_emp is the percentage change in employment
- B_emp is the regression coefficient for employment
- delta_hhinc is the percentage change in household income
- B_hhinc is the regression coefficient for household income
We are given that the model was estimated using zonal averages, so we can assume that the regression coefficients are the same for all households in the area.
From the problem statement, we know that the average household income is $40,000, the average household size is 4.8, and on average, 1.5 members of each household are working. Therefore, the total number of workers in the area is:
1400 households * 4.8 persons per household * 1.5 workers per household
= 10,080 workers
If employment increases by 25%, the new number of workers will be:
10,080 * 1.25 = 12,600 workers
If household income increases by 10%, the new average household income will be:
$40,000 * 1.1 = $44,000
Now we need the regression coefficients for employment and household income, denoted by B_emp and B_hhinc, respectively. These coefficients would have been estimated as part of the model development process, so we do not have enough information to calculate them without additional context.
Assuming we have the necessary coefficients, we can plug in the values for delta_emp, delta_hhinc, B_emp, and B_hhinc into the formula to calculate delta_trips. The resulting value would give us an estimate of the change in the number of peak-hour social/recreational trips.
Without the regression coefficients, it is not possible to provide a specific estimate for the change in the number of peak-hour social/recreational trips.
The predicted change in the number of peak-hour social/recreational trips is approximately 0.92 trips.
How does employment and household income affect peak-hour trips?we need to consider the effects of changes in employment and household income to predict the change in the number of peak-hour social/recreational trips using the model described in example 8.2,
Let's break down the problem and calculate the steps one by one:
Calculate the current number of peak-hour social/recreational trips:
Average household income: $40,000
Average household size: 4.8
Average number of working members: 1.5
According to the model, the number of peak-hour social/recreational trips can be estimated using the formula:
Number of trips = (Income per capita / 1000) + (0.2 * Working members per household) + 0.1
Income per capita = Average household income / Average household size
Income per capita = $40,000 / 4.8 = $8,333.33 (approx.)
Number of trips = ($8,333.33 / 1000) + (0.2 * 1.5) + 0.1
Number of trips = 8.33 + 0.3 + 0.1
Number of trips = 8.73 (approx.)
So, the current number of peak-hour social/recreational trips is approximately 8.73.
2.Calculate the predicted change in the number of peak-hour social/recreational trips:
Employment increase: 25%
Household income increase: 10%
We will calculate the changes in income per capita and working members per household using the given increases:
New income per capita = Income per capita + (Income per capita * Household income increase)
New income per capita = $8,333.33 + ($8,333.33 * 0.10)
New income per capita = $8,333.33 + $833.33
New income per capita = $9,166.66 (approx.)
New working members per household = Average number of working members + (Average number of working members * Employment increase)
New working members per household = 1.5 + (1.5 * 0.25)
New working members per household = 1.5 + 0.375
New working members per household = 1.875 (approx.)
Now, we can calculate the predicted number of trips using the same formula as before:
New number of trips = (New income per capita / 1000) + (0.2 * New working members per household) + 0.1
New number of trips = ($9,166.66 / 1000) + (0.2 * 1.875) + 0.1
New number of trips = 9.17 + 0.375 + 0.1
New number of trips = 9.645 (approx.)
Therefore, the predicted change in the number of peak-hour social/recreational trips is approximately 9.645 - 8.73 = 0.915 (approx.), or approximately 0.92 trips.
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Tech a states that the scrub braking system worked well in rubber tires. tech b states that the scrub braking system worked reasonably well on dry wheel surfaces made of wood or steel. who is correct?
select one:
a. tech a
b. tech b
c. both a and b
d. neither a nor b
Answers
Tech A is correct with respect to the scrub braking system that really worked well in rubber tires. Thus, the correct option for this question is A.
What is a Scrub braking system?A scrub braking system may be defined as a type of system that significantly utilizes leverage to force a friction block against one or more wheels and allow it to stop from movement.
This scrub braking system actually works well on rubber tires because it involves a diagonal braking system. The suspension of this geometry typically compensates for the sudden braking of the rubber tires.
Therefore, tech A is correct with respect to the scrub braking system that really worked well in rubber tires. Thus, the correct option for this question is A.
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A triangular plate with a base 5 ft and altitude 3 ft is submerged vertically in water. If the base is in the surface of water, find the force against onr side of the plate. Express the hydrostatic force against one side of the plate as an integral and evaluate it. (Recall that the weight density of water is 62.5 lb/ft3.)
Answers
Answer:
Hydrostatic force = 41168 N
Explanation:
Complete question
A triangular plate with a base 5 ft and altitude 3 ft is submerged vertically in water so that the top is 4 ft below the surface. If the base is in the surface of water, find the force against onr side of the plate. Express the hydrostatic force against one side of the plate as an integral and evaluate it. (Recall that the weight density of water is 62.5 lb/ft3.)
Let "x" be the side length submerged in water.
Then
w(x)/base = (4+3-x)/altitude
w(x)/5 = (4+3-x)/3
w(x) = 5* (7-x)/3
Hydrostatic force = 62.5 integration of x * 4 * (10-x)/3 with limits from 4 to 7
HF = integration of 40x - 4x^2/3
HF = 20x^2 - 4x^3/9 with limit 4 to 7
HF = (20*7^2 - 4*7^(3/9))- (20*4^2 - 4*4^(3/9))
HF = 658.69 N *62.5 = 41168 N
Hey guys can anyone list chemical engineering advancement that has been discovered within the past 20 years
Answers
Nanopesticides. The world population keeps growing. ...
Enantio selective organocatalysis. ...
Solid-state batteries. ...
Flow Chemistry. ...
Porous material for Water Harvesting. ...
Directed evolution of selective enzymes. ...
From plastics to monomers. ...
When measuring the resistance of an electrical load, connect the meter ____ the load.
Answers
Answer:
multimeter
Explanation: in parallel
estimate the theoretical fracture strength of a brittle material if it is known that fracture occurs by the propagation of an elliptically shaped surface crack of length 0.29 mm and that has a tip radius of curvature of 0.004 mm when a stress of 1300 mpa is applied.
Answers
The theoretical fracture strength of the brittle material is estimated to be approximately 165.6 MPa when a stress of 1300 MPa is applied and fracture occurs by the propagation of an elliptically shaped surface crack of length 0.29 mm and tip radius of curvature of 0.004 mm.
To estimate the theoretical fracture strength of a brittle material given the information provided, we can use Griffith's theory of brittle fracture. According to this theory, the fracture strength of a brittle material can be expressed as:
σ_f = (2Eγπa)^0.5
where σ_f is the fracture strength, E is the elastic modulus, γ is the surface energy per unit area, and a is the length of the elliptically shaped surface crack.
To calculate the fracture strength, we need to first determine the surface energy per unit area of the material. For glass, a typical value of surface energy is around 1 J/m^2.
Given the length of the elliptically shaped surface crack (a) is 0.29 mm, and the tip radius of curvature is 0.004 mm, we can calculate the crack area (A) as follows:
A = πab = π(0.29/2)(0.004)
A ≈ 5.67 x 10^-7 m^2
Next, we can calculate the elastic modulus (E) of the material. For glass, the elastic modulus is typically around 70 GPa.
Substituting these values into the equation for fracture strength, we get:
σ_f = (2Eγπa)^0.5 = [2(70 x 10^9)(1)(π)(0.29 x 10^-3)]^0.5
σ_f ≈ 165.6 MPa
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A CUSTOMER BRINGS HER CAR INTO THE
SHOP WITH A COMPLAINT THAT BOTH
HEADLIGHTS ARE NOT WORKING.
TECHNICIAN A SAYS TO CHECK THE CONDITION OF THE BULBS FIRST. TECHNICIAN B CHECKS THE FUSE IN THE HEADLIGHT CIRCUIT & THEN TESTS THE OPERATION OF THE HEADLIGHT SWITCH WHO IS CORRECT AND WHY ?
HELP ME ASAP
Answers
a bc if the bulbs are in a bad conditio. than u know that u dont have to remove it but only repair it.
Technician A says that the computer can be used to control the output of the alternator by controlling the field current. Technician B says that voltage regulators control the alternator output by controlling the field current through the rotor. Which technician is correct
Answers
The computer in modern vehicles can control the output of the alternator by controlling the field current. The computer receives information from various sensors in the vehicle, such as the battery temperature and voltage, and adjusts the field current accordingly to ensure that the alternator output is sufficient to meet the electrical needs of the vehicle.
Voltage regulators, which are also used in modern vehicles, control the alternator output by controlling the field current through the rotor. The voltage regulator monitors the voltage output of the alternator and adjusts the field current to maintain a stable voltage output, typically around 14 volts.
Therefore, both Technician A and Technician B are correct in their statements, and their statements are complementary.
The voltage regulators control the alternator output by controlling the field current through the rotor, so Technician B is correct.
Voltage regulators control the alternator output by regulating the field current through the rotor. The voltage regulator is an integral part of the alternator system and is responsible for monitoring the electrical output of the alternator and adjusting the field current to maintain a stable voltage.
The voltage regulator continuously monitors the electrical system's voltage and sends a signal to the alternator to adjust the field current accordingly. If the voltage drops below the desired level, the regulator increases the field current, which boosts the alternator's output. Conversely, if the voltage rises above the desired level, the regulator decreases the field current to reduce the alternator's output.
While computers and electronic control systems are used in modern vehicles to monitor and control various aspects of the electrical system, such as engine performance and emissions, they do not directly control the output of the alternator by manipulating the field current. The voltage regulator is responsible for that task.
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What quantity measures the effect of change?
control variable
independent variable
relative variable
dependent variable
Answers
Answer:
The Dependent Variable is the Effect, Its value depends on changes from the Independent Variable
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For each of the following functions indicate the class Θ(g(n)) the function belongs to. (Use the simplest g(n) possible in your answers.) Prove your assertions. a. (n2+1)10 c. 2n lg(n +2)2(n 2)2lg e. [log2n] d. 2"+1+3-1
Answers
a. The function (n^2 + 1)^10 belongs to the class Θ(n^20), because (n^2 + 1)^10 ≤ (n^2)^10 = n^20 for all n ≥ 1, and (n^2 + 1)^10 ≥ (n^2)^10/2 = (n^20)/2 for all n ≥ 2.
b. The function 2^n lg(n + 2)^2/(n^2 lg(n))^2 belongs to the class Θ(2^n), because 2^n lg(n + 2)^2/(n^2 lg(n))^2 ≥ 2^n for all n ≥ 1, and 2^n lg(n + 2)^2/(n^2 lg(n))^2 ≤ 2^(n+2) for all n ≥ 2.
c. The function [log2n] belongs to the class Θ(log n), because [log2n] ≤ log2n ≤ [log2n] + 1 for all n ≥ 1.
d. The function 2^(n+1) + 3^(n-1) belongs to the class Θ(3^n), because 2^(n+1) + 3^(n-1) ≤ 3(3^n)/2 for all n ≥ 1, and 2^(n+1) + 3^(n-1) ≥ 3^n for all n ≥ 3.
For each of the following functions, I will indicate the class Θ(g(n)) the function belongs to and provide a brief proof for each:
a. (n^2+1)^10
The function belongs to Θ(n^20). This is because the highest power of n is the dominating factor, and other terms become insignificant as n grows larger.
b. 2n lg((n+2)^2)(n^2)2lg
Assuming "lg" stands for logarithm base 2, this function belongs to Θ(n^3*log(n)). Here, the main factors are n from 2n and n^2 from (n^2)2lg, multiplied by the logarithmic term lg((n+2)^2), which simplifies to 2*log(n+2) ≈ 2*log(n).
c. [log2n]
This function belongs to Θ(log(n)), since the brackets indicate the integer part of the logarithm, which only marginally affects the growth of the function.
d. 2^(n+1)+3^(n-1)
The function belongs to Θ(3^n), as the exponential term 3^(n-1) dominates the growth of the function compared to 2^(n+1).
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In the circuit of Figure 1, V = 277 volts, L = 2 mH, R = 0:4 Ω, and Ï = 2Ï60 rad/s. Determine (a) the rms symmetrical fault current; (b) the rms asymmetrical fault current at the instant the switch closes, assuming maximum dc offset; (c) the rms asymmetrical fault current 5 cycles after the switch closes, assuming maximum dc off-set; (d) the dc offset as a function of time if the switch closes when the instantaneous source voltage is 300 volts.
Answers
(a) The rms symmetrical fault current is 326.65 A
(b) The rms asymmetrical fault current at the instant the switch closes, assuming maximum dc offset is 397.4π A
(c) The rms asymmetrical fault current 5 cycles after the switch closes, assuming maximum dc off-set is 324.539 A
(d) The dc offset as a function of time if the switch closes when the instantaneous source voltage is 300 volts is 351.43\(e^{200t}\) A
What is symmetrical fault current?Transmission line faults can generally be divided into the following categories:
Symmetrical faultsAsymmetrical faultsA symmetrical fault in a power system is a type of fault that results in a short circuit involving all three phases. This could be a three phase short circuit or a three phase to ground fault.
When a fault is symmetrical, fault currents in the phases are symmetrical in that their magnitudes are equal and they are equally spaced by a 120° angle. So, a symmetrical fault with a high value of current in phases may be taken for granted as the norm.
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Type the correct answer in the box. Spell all words correctly.
A genetically engineered hormone, , can treat Mary’s child for growth hormone deficiencies by stimulating body growth and increasing muscle mass.
Answers
Answer:
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Explanation:
Answer:
recombinant human growth
Explanation:
yes