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jolli1 [7]
3 years ago
15

A motor exerts a force of 12,00N to lift an elevator 8.0m in 7.0secs what is the power produced by the motor?

Physics
1 answer:
SashulF [63]3 years ago
6 0

Answer:

1371.4watt

Explanation:

from power=energy/time

BUT energy=force times distance

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How do scientists use the doppler effect to understand the universe?
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3 years ago
A cylinder which is in a horizontal position contains an unknown noble gas at 4.63 × 104 Pa and is sealed with a massless piston
AleksandrR [38]

Answer:

The change in internal energy of the system is -17746.78 J

Explanation:

Given that,

Pressure P=4.63\times10^{4}\ Pa

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Radius = 0.272 m

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Using thermodynamics first equation

dU=Q-W...(I)

Where, dU = internal energy

Q = heat

W = work done

Put the value of W in equation (I)

dU=Q-PdV

Where, W = PdV

Put the value in the equation

dU=-1.95\times10^{4}-(4.63\times10^{4}\times3.14\times(0.272)^2\times(-0.163))

dU=-17746.78\ J

Hence, The change in internal energy of the system is -17746.78 J

3 0
4 years ago
How must the height of A relate to the height of B for the skateboarder to have just enough energy to complete the loop?
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Answer:

The answer is D

Explanation:

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