An object of volume 1 m ³ and mass 2kg is totally immersed in a liquid of density 1 kgm^-3 . Calculate its apparent weight.

The pressure at any point in a liquid at rest depends only on the

A balloon whose volume is 300m³ is filled with hydrogen. If the density of air is 1.3 kgm^-3, find the upthrust on the balloon. [g = 10ms^-2]

Clinical thermometers are examples of

Two metals P and Q are heated through the same temperature difference. If the ratio of the linear expansivities of P to Q is 2:3 and the ratio of their
length is 3: 4 respectively, the ratio of the increase in lengths of P to Q is