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7nadin3 [17]
3 years ago
12

Why can’t a real machine ever have 100% efficiency

Physics
1 answer:
Harman [31]3 years ago
4 0

Answer:

Almost all machines require energy to offset the effects of gravity, friction, and air/wind resistance. Thus, no machine can continually operate at 100 percent efficiency.

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The correct answer should be C. Hydroelectric power stations can only produce enough energy for a small town as they do not produce large quantities

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3 years ago
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A 25.0 g marble sliding to the right at 20.0 cm/s overtakes and collides elastically with a 10.0 g marble moving in the same dir
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In collision that are categorized as elastic, the total kinetic energy of the system is preserved such that,

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The kinetic energy of the system before the collision is solved below.

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3 years ago
Why metals have thermoconductivity higher than ceramic?
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Answer:

Thermal Conductivity Easily Transmits Heat Among Fine Ceramics

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2 years ago
If a car is traveling at a velocity of +10m/s suddenly turns around and continues at the same speed, what is its new velocity?
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