A substance of mass kg requires a power input of watts to remain in the molten state…

PHYSICS · Subjective · A Level · Physics · Further mechanics and thermal physics · Further mechanics and thermal physics

Problem

A substance of mass

M

kg requires a power input of

P

watts to remain in the molten state at its melting point. When the power source is turned off, the sample completely solidifies in time

t

seconds. The latent heat of fusion of the substance is .....