Question

A waterfall is 100 m high. How much warmer will the water be afterthe fall?

Assume that all the work gets converted into the heat energy.

Take the average value of g to be 980 cm s



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Answer 1

h=100 m

P.E = mgh=> m X 9.8 X 100

=>980m J

Therefore, 980m J is converted to heat.

As, Q=mc△T

△T=?

980m=m X 4200 X △T

980=4200 X △T

△T=7/30

△T=0.23 K or °C

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Answer 2

Answer:

A waterfall is 100 m high. How much warmer will the water be afterthe fall?

Assume that all the work gets converted into the heat energy.

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