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leonid [27]
3 years ago
14

Why can't the efficiency of a heat engine be 100%?

Physics
1 answer:
Papessa [141]3 years ago
5 0
The efficiency can never be 100 because some of the work will be transferred into thermal energy. In turn, causing the percentage to decrease. This is basically the second law of thermodynamics.
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A constant velocity implies the two forces must be equal and opposite.
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3 0
4 years ago
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Two objects are dropped from rest from the same height. Object A falls through a distance <img src="https://tex.z-dn.net/?f=d_A"
Alenkinab [10]

Answer:

The answer to your question is given below

Explanation:

Since both object A and B were dropped from the same height and the air resistance is negligible, both object A and B will get to the ground at the same time.

From the question, we were told that object A falls through a distance to dA at time t and object B falls through a distance of dB at time 2t.

Remember, both objects must get to the ground at the same time..!

Let the time taken for both objects to get to the ground be t.

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Therefore,

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For B

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4 = 1

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8 0
3 years ago
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Answer:

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Explanation:

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