Physics Past Questions and Answers

22,000J of heat is required to raise the temperature of 1.5kg of paraffin from 20<sup style='font-size: smaller;'>o</sup>C to 30<sup style='font-size: smaller;'>o</sup>C. Calculate the specific heat capacity of paraffin.

In which of the following are the substance arranged in descending order of their thermal conductivities?

The vacuum in a thermos flask helps to reduce heat transfer by?

Which of the following phenomena explains the fact that a house whose roof is coated with white paint will be cooler in the hot season than one coated with black paint ?

Calculate the amount of heat required to convert 2kg of ice at 2<sup style='font-size: smaller;'>o</sup>C to water at 0<sup style='font-size: smaller;'>o</sup>C. [specific heat capacity of ice = 2090Jkg<sup style='font-size: smaller;'>-1</sup><sup style='font-size: smaller;'>o</sup>C<sup style='font-size: smaller;'>-1</sup>, specific latent heat of fusion of ice = 333kJkg<sup style='font-size: smaller;'>-1</sup>]