thermal properties of matter Questions

A brass wire length 2 m and radius 1 mm at 27°C is held taut between two rigid supports. Initially it was cooled to a temperature of −43°C creating a tension T in the wire. The temperature to which the wire has to be cooled in order to increase the t

Steam at 100°C is passed into 20 g of water at 10°C. When water acquires a temperature of 80°C, the mass of water present will be : [Take specific heat of water = 1 cal−1°C−1 and latent heat of steam = 540 cal−1]

The amount of heat energy required to raise the temperature of 1g of Helium at constant volume, from T1 K to T2 K is:-

A metallic vessel of negligible heat capacity contains 0.5 kg of water (of specific heat capacity 4200 J kg⁻¹ K⁻¹). It is heated from 15°C to 85°C by 750 W immersion heater in 4 minutes. The average loss of power in watts to the surroundings from the

A cylindrical metallic rod is in thermal contact with two reservoirs of heat, its two ends conduct an amount of heat Q in time t in steady state. If this rod is replaced by another rod of same material having double radius of the first rod. The amoun

What is thermal coefficient of volume expansion for an ideal gas at constant pressure?

Two different wires having lengths L1 and L2 , and respective temperature coefficient of linear expansion α1 and α2 , are joined end-to-end. Then the effective temperature coefficient of linear expansion is:

A massless box contains ideal gas moving at 3v. If suddenly stopped, rise in temperature is:

A metallic sphere has a mass of 40 g. If its specific heat capacity is 0.15 cal g−1 °C−1, find the water equivalent of this sphere.