Posted by **Anonymous** on Monday, February 13, 2012 at 12:19am.

A 4.2 kg rock is initially at rest at the top of

a cliﬀ. Assume that the rock falls into the

sea at the foot of the cliﬀ and that its kinetic

energy is transferred entirely to the water.

How high is the cliﬀ if the temperature of

1.5 kg of water is raised 0.10

◦

C? The acceleration of gravity is 9.81 m/s

2

and the speciﬁc

heat of water is 4186 J/kg ·

◦

C.

Answer in units of m

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