A chain 70 meters long whose mass is 21 kilograms is hanging over the edge of a tall building and does not touch the ground. How much work is required to lift the top 11 meters of the chain to the top of the building? Use that the acceleration due to gravity is 9.8 meters per second squared. Your answer must include the correct units. Work =

Q: please explaine how to get 42?

A:

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Q: -₩220-13

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Q: Number 43, please.

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Q: Answer number 4

A:

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A: Se=0.057847, df=n-2=23

Q: 18

A:

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A: detailed solution is given below

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