When A Strip Made Of Iron (α1) And Copper (α2 > α1) Is Heated: 

Three liquids with masses m₁, m₂, m₃ are thoroughly mixed. If their specific heats are s₁, s₂, s₃ and their temperature θ₁, θ₂, θ₃ respectively, then the temperature of the mixture is:    

80 gm of water at 30^oC is poured on a large block of ice at 0^oC. The mass of ice that melts is:

250 gm of water and equal volume of alcohol of mass 200 gm are replaced successively in the same calorimeter and cool from 60^oC to 55^oC in 130 seconds and 67 seconds respectively. If the water equivalent of the calorimeter is 10 gm, then the specific heat of alcohol in cal/gm-^oC is:   

The sprinkling of water reduce the temperature of a closed room because: 

Two bars of copper having same length but unequal diameter are heated to the same temperature. The change in length will be:  

The beaker is completely filled with water at 4^oC. It will overflow:

When a metal rod is heated it expands because: 

Expansion during heating: 

Two rods of lengths L₁ and L₂ are made of materials whose coefficients of linear expansion are α₁ and α₂. If the difference between the two lengths is independent of temperature:  

An iron tyre is to be fitted onto a wooden wheel 1.0 m in diameter. The diameter of thetyre is 6 mm smaller than that of wheel. The tyre should be heated so that its temperature increases by a minimum of (coefficient of volume expansion of iron is 3.6× 10^–5/^oC):