When the 3.0 kg cylinder fell 500 m, the final temperature of the water was

temperature was c.

When the 9.0 kg cylinder fell 500 m, the final temperature of the water was

temperature was 'C.

°C and the change in

Change in temperature = 7.14° C

Explanation:

Assuming all potential energy of cylinder is converted into heat energy to increase the temperature.

Work done by gravity in first case = m * g*h = 3*10*500=15000

Let quantity of water be 1 kg at 0°C.

Also specific heat capacity of water is = 4200 Joule

So potential energy is converted to m*4200*T (1) = 15000

T (1) = 3.57

Work done by gravity in first case = m * g*h = 9*10*500=45000

Here also potential energy is converted into m*4200*T (2) = 45000

T (2) = 10.71

Here temperature is increasing.

Thus change in temperature = T (1) - T (2) = 7.14° C