When two bodies and are kept in contact, it is found that heat gets transferred from Q to P.
Which physical quantity determines the direction of transfer of heat energy?

When two bodies and are kept in contact, it is found that heat gets transferred from Q to P. Which of the two (Por Q) is hotter?

Look at the figure and answer the question. How does the heat get transferred from A B C D point A to the hand?

An ideal diatomic gas with C_V = (5 R)/2 occupies a volume (V_(i) at a pressure (P_(i) . The gas undergoes a process in which the pressure is proportional to the volume. At the end of the process, it is found that the rms speed of the gas molecules has doubles from its initial value. Determine the amount of energy transferred to the gas by heat.

Heat transferred from surroundings to the system will increase or decrease the total energy content of the system.

Sometimes it is said that "heat is developed" in a resistance when there is an electric eurrent in it .Recall that heat is defined as the energy being transferred due to the temperature difference, Is the statement under quotes technically correct?

Two neutral particles are kept 1m apart. Suppose by some mechanism some charge is transferred from one particle to the other and the electric potential energy lost is completely converted into a photon. Calculate the longest and the next smaller wavelength of the photon possible. h=6.63xx10^(-34)Js .

Give an example of a process in which no heat is transferred to or from a system but the temperature of the system changes?

Two identical long, solid cylinders are used to conduct heat from temp T_(1) to Temp T_(2) . Originally the cylinders are connected in series and the rate of heat transfer is H. If the cylinders are connected in parallel then the rate of heat transer would be:

When two semiconductor of p and n type are brought in to contact, they from a p-n junction which acts like a :-

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.