3 years ago

Over the past 150 years, what has happened to the amount of forest cover in Minnesota?

Physics

1 answer:

Airida [17]3 years ago

4 0

I think D. None of the above

I think that it

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What is energy converted to if it is not used to do work?

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Answer:

the human body isn't very efficient at converting food into useful work. The human body is less than 5% efficient most of the time. The rest of the energy is converted to heat, which may or may not be useful, depending on how cool or warm a person wants to be.

Explanation:

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Which Chinese man was leader of the National People's Party, called the Guomindang, in 1925?

Len [333]

<span>C. Mao Zedong
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A heat engine does 200 j of work per cycle while exhausting 600 j of heat to the cold reservoir. what is the engine's thermal ef

AveGali [126]

The thermal efficiency of an engine is
$\eta= \frac{W}{Q}$
where
W is the work done by the engine
Q is the heat absorbed by the engine to do the work

In this problem, the work done by the engine is W=200 J, while the heat exhausted is Q=600 J, so the efficiency of the machine is
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3 years ago

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What Kepler's constant ? ? ! ?

The only constant in Kepler's laws is in the third one, where it says something to the
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That means it's a constant for multiple little ones orbiting the same central body.
But it's not the same constant for other central bodies.

It's one constant for the planets, asteroids, and comets orbiting the sun.

It's a different constant for the moon, TV satellites, weather satellites,
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