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vova2212 [387]
3 years ago
12

What is the minimum force required to increase the energy of a car by 69 J over a distance of 42 m? Assume the force is constant

.
Group of answer choices

0.61 N

69 N

2900 N

1.6 N

110 N
Physics
1 answer:
sineoko [7]3 years ago
3 0
ANSWER: 1.6N (forth option)



EXPLANATION:
E= Force x displacement
69=F(42)
69/42 = F
F=1.64 N

Answer : 1.6N
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During an adiabatic process an object does 100 J of work and its temperature decreases by 5 K. During another process it does 25
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Answer:

The heat capacity for the second process is 15 J/K.

Explanation:

Given that,

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For adiabatic process,

The heat energy always same.

dQ=0

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We need to calculate the number of moles and specific heat

Using formula of heat

dU=nC_{v}dT

nC_{v}=\dfrac{dU}{dT}

Put the value into the formula

nC_{v}=\dfrac{-100}{5}

nC_{v}=-20\ J/K

We need to calculate the heat

Using formula of heat

dQ=nC_{v}(dT_{1})+dW_{1}

Put the value into the formula

dQ=-20\times5+25

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We need to calculate the heat capacity for the second process

Using formula of heat

dQ=nC_{v}(dT_{1})

Put the value into the formula

-75=nC_{v}\times(-5)

nC_{v}=\dfrac{-75}{-5}

nC_{v}=15\ J/K

Hence, The heat capacity for the second process is 15 J/K.

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3 years ago
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Answer:

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A biker pedals hard for 3 seconds. What is his initial velocity if he accelerated by 4m/s2 until he's going 20m/s. (Which equati
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Objects with unlike charges what each other
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it takes 560s for a runner to complete one circular lap, moving at a speed of 6.00 m/s. what is the radius of a track?
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Answer:

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