Even when no heat is exchanged by the contents of a thermos flask,m the contents get heated up by constant shaking. Why?

Heat is generated continuosly in an electric heater ,but its temperature becomes constant after some time.Why?

The heat content of the products is more than that of the reactants in an ----------- reaction.

Even when earth receives solar energy, why is it not getting warmed up continuously?

Explain why molar specific heat at constant pressure is greater than that at constant volume?

The ratio of specific heat of a agas at constatnt pressure to that constatnt volume is gamma . The change in internal energy of one mole of a gas when volume changes from V to 2V at constant pressure P is

A brass boiler has a base area of 0.15 m2 and thickness 1.0 cm. It boils water at the rate of 6.0 kg/min when placed on a gas stove. Estimate the temperature of the part of the flame in contact with the boiler. Thermal conductivity of brass = 109 J s ^-1m^- 1K^-1 , Heat of vaporisation of water = 2256 xx 10^3 J kg^-1 .

Why heat energy is produced, when electric current passes through a resistance wire?

Why does a piece of red glass when heated and taken out glow with green light?

A thermos flask containing tea is shaken vigorously considering tea as a system. (a) Has heat been added to tea? (b) Has work been done on it? (c) Has its internal energy changed? (d) Does its temperature rise?