Physics Past Questions and Answers

A few grains of table salt were put in a cup of water, kept at constant temperature and left undisturbed. Eventually all the water tasted salty. The action is due to

A temperature 20°C is the same as

The latent heat of fusion of ice is 80cal g<sup style='font-size: smaller;'>-1</sup>. How much heat is required to change 10g of ice at Q<sup style='font-size: smaller;'>o</sup>C into water at the same temperature?

A gas at pressure PNm\(^{-2}\) and temperature 27°C is heated to 77°C at constant volume. The new pressure is

The following are some units i. Ns ii. Mm iii. Nm<sup style='font-size: smaller;'>-2</sup> iv. J<sup style='font-size: smaller;'>o</sup>K<sup style='font-size: smaller;'>-1</sup>. What are the units of latent heat?