Our day is 24 hours long because that is the time it takes the earth to

Chemistry

2 answers:

Marianna [84]3 years ago

3 0

Complete one rotation.

Hope this helps.

Anna [14]3 years ago

3 0

Our day is 24 hours long because that is the time it takes the earth to make one rotation on it's axis.

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A force of 5000 newtons is applied to a 1200 kg car at rest. What is its acceleration?

insens350 [35]

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3 years ago

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lora16 [44]

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3 years ago

A person applies a force of 200 N over 1.5 m to a jack. The jack exerts a 1000-N force on a car a distance of 0.02 m. What is th

xz_007 [3.2K]

Answer:

The efficiency rating of the jack is 0.067.

Explanation:

We have, a person applies a force of 200 N over 1.5 m to a jack. The jack exerts a 1000-N force on a car a distance of 0.02 m.

It is required to find the the efficiency rating of the jack. It is equal to the ratio of output work to the ratio of input work. So,

$\eta=\dfrac{1000\times 0.02}{200\times 1.5}\\\\\eta=0.067$

Thus, the efficiency rating of the jack is 0.067.

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3 years ago