Name the process which is associated with dissipated energy process and reduce the efficiency.

Give the process which are quasi-static and do not dissipated energy.

Name the ores which are concentrated by froth floatation process.

Name the process by which a tadpole develop into an adult frog.

An ideal monoatomic gas occupies volume 10^(-3)m^(3) at temperature 3K and pressure 10^(3) Pa. The internal energy of the gas is taken to be zero at this point. It undergoes the following cycle: The temperature is raised to 300K at constant volume, the gas is then expanded adiabatically till the temperature is 3K , followed by isothermal compression to the original volume . Plot the process on a PV diagram. Calculate (i) The work done and the heat transferred in each process and the internal energy at the end of each process, (ii) The thermal efficiency of the cycle.

In a thermodynamics process which one of the following statement is not true ?

The internal energy of a system remains constant when it undergoes (i) a cyclic process (ii) an isothermal process (iii) an adiabatic process (iv) any process in which the heat given out by the system equal to the work done on the system