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NeX [460]
3 years ago
7

A machine can never be 100% efficient because some work is always lost due to what?

Physics
2 answers:
katrin [286]3 years ago
8 0

A machine can never be 100% efficient because some work is always lost due to the lack of materials or equipment that would convert work by 100%. It follows the second law of entropy. The ideal engine is known as Carnot’s engine having a 100% efficiency. So far, no engine has ever gotten to 100%.

kari74 [83]3 years ago
8 0

Answer:

Friction

Explanation:

Ik cuz i took tha test, i wouldn't lie to fellow students <3

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garik1379 [7]

The answer would be B..

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Suppose your friend claims to have discovered a mysterious force in nature that acts on all particles in some region of space. H
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Answer:

             U = 1 / r²

Explanation:

In this exercise they do not ask for potential energy giving the expression of force, since these two quantities are related

             

         F = - dU / dr

this derivative is a gradient, that is, a directional derivative, so we must have

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the esxresion for strength is

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let's replace

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Why does a plastic comb attract small bits of paper after rubbing with wool?
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Static electricity. Like the balloon against hair
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