Physics Past Questions and Answers

The lower and upper fixed points of a mecury-in-glass thermometer are marked Y and 180mm respectively. On a particular the mecury meniscus in the thermometer rises to 45mm. If the corresponding reading on a scale is 10^o, calculate the value of Y.

A piece of brass of mass 170kg has its temperature raised from 0^oC to 30^oC. Calculate its increase in volume, given the density of brass at 0^oC as 8.5 x 10³kgm³ and its cubic expansivity as 5.7 x 10^-1k¹

The average kinetic energy of the molecules of a perfect gas is directly proportional to the

How much heat is emitted when a body of mass 200g cools from 37^oC to 31^oC? (specific heat capacity of the body = 0.4Jg^-1K^-1,)

If the cubic expansivity of brass between 27^oC and 100^oC is 5.7 x 10^-5K^-1, What is its linear expansivity?