Question

A metal ball of specific gravity `4.5` and specific heat `0.1 cal//gm-"^(@)C` is placed on a large slab of ice at `0^(@)C`. Half of the ball sinks in the ice. The initial temperature of the ball is:- (Latent heat capacity of ice `=80 cal//g`, specific gravity of ice `=0.9)`
A. `100"^(@)C`
B. `90"^(@)C`
C. `80"^(@)C`
D. `70"^(@)C`

Answer 1

Correct Answer - C
`V xx 4.5 xx 10^(3) xx 0.1 xx T = (V)/(2) xx 0.9 xx 10^(3) xx 80`
`T = (9 xx 800)/(2xx4.5 xx 11) = 80^(@)C`