Write relation between α and β?

The expansion of solids on heating and contraction on cooling is called

From the following which one is correct ?

From the following quantity which one is measured using the principle of calorimetry ?

In a thermos flask, the vacuum between its walls reduces the heat loss by

Which is the following is a good source of heat radiation?

A brass 1m long, when heated through 50^oC increases in length by 1.60 mm. Calculate the coefficient of linear expansion for brass.

Density of water is maximum at

Real expansion is associated with which of the following substance ?

A steel rail road track has a length of 30m when the temperature is 20^oC. What is its length on a hot day when the temperature is 46^oC?(α = 11 × 10^-6/k)