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olga nikolaevna [1]
2 years ago
7

A pail in a water well is hoisted by means of a frictionless winch, which consists of a spool and a hand crank. When Jill turns

the winch at her fastest water-fetching rate, she can lift the pail the 28.0 m to the top in 11.0 s. Calculate the average power supplied by Jill's muscles during the upward ascent. Assume the pail of water when full has a mass of 7.30 kg.
Physics
1 answer:
Sveta_85 [38]2 years ago
6 0

Answer:

182.28 W

Explanation:

Here ,

m = 7.30 Kg

distance , d= 28.0 m

time , t = 11.0 s

average power supplied = change in potential energy/time

average power supplied = m×g×d/time

average power supplied = 7.30×9.81×28/11

average power supplied = 182.28 W

the average power supplied is  182.28 W

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The length at the final temperature is 11.7 cm.

Explanation:

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\Delta L=\alpha L_{0}\Delta T

Where:

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So, we have:

L_{f}-L_{0}=\alpha L_{0}(T_{f}-T_{0})

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Therefore, the length at the final temperature is 11.7 cm.

I hope it helps you!

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