Question

A 1 kg cube of ice of volume 1000 ml at temperature 0⁰C is placed in a cylinder of cross sectional area 200 cm² . If ice melts only on top surface by absorbing heat from environment at a rate 80 cal per second. The time when ice lifts from base of cylinder is – (given density of water 1000 kg/m³)

• A. 4 min. 10 sec
• B. 8 min. 20 sec.
• C. Will never lift
• D. More than 10 min.

Answer 1

Answer: (B)

8 min. 20 sec.

Answer 2

Ice will float when completely immersed.