Question

If the height of Niagra fall is 50 m, the difference between the temperatures of water at the top and the bottom of the fall is –

• A. 117⁰C
• B. 11.7⁰C
• C. 1.17⁰C
• D. 0.117⁰C

Answer 1

Answer: (D)

0.117⁰C

Answer 2

Apply $\frac{mgh}{J}$ = msdT

A 2 gm bullet moving with a velocity of 200 m/s is brought to a sudden stoppage by an obstacle. The total heat produced goes to the bullet. If the specific heat of the bullet is 0.03 cal/gm-⁰C, the rise in its temperature will be –