Is temperature a conserved quantity in transfer of heat between two bodies at different temperatures.

Heat is the transfer of energy between two objects with different …….

heat flows between two bodies due to difference in their

A composite body consists of two rectangular plates of the same dimensions but different thermal conductivities K_A and K_B . This body is used to transfer heat between two objects maintained at different temperatures. The composite body can be placed such that flow of heat takes place either parallel to the interface or perpendicular to it. Calculate the effective thermal conductivities K_(||) and K_(bot) of the composite body for the parallel and perpendicular orientations. Which orientation will have more thermal conductivity ?

Temperature is a _____quantity.

Assertion : Work and heat are two equivalent form of energy. Reason : Work is the transfer of mechanical energy irrespective of temperature difference, whereas heat is the transfer of thermal energy because of temperature difference only.

Statement-1: Work and Heat are two equivalent form of energy. Statement-2: Work is transfer of mechanical energy irrespective of temperature-differene whereas heat is transfer of thermal energy because of temperature difference only.

Newton’s law of cooling says that the rate of cooling of a body is proportional to the temperature difference between the body and its surrounding when the difference in temperature is small. (a) Will it be reasonable to assume that the rate of heating of a body is proportional to temperature difference between the surrounding and the body (for small difference in temperature) when the body is placed in a surrounding having higher temperature than the body? (b) Assuming that our assumption made in (a) is correct estimate the time required for a cup of cold coffee to gain temperature from 10^(@)C to 15^(@)C when it is kept in a room having temperature 25^(@)C . It was observed that the temperature of the cup increases from 5^(@)C to 10^(@)C in 4 min