Thermal Propert...

Two plastic cups are placed one inside the other. A small spacer keeps the two cups separated. How water is poured into the inner cup and a lid is put on top, as shown.
Which statement is correct?

End $$A$$ of a copper rod is. maintained in steam chamber and other end is maintained at $$0^{\circ}C$$. Assume $$x = 0$$ at $$A$$. The $$T - x$$ graph for the rod in steady state is

$$2$$ mole ideal He gas and $$3$$ mole ideal $$H_2$$ gas at constant volume find out $$C_v$$ of mixture 

A fixed mass of gas is taken through a process $$A\rightarrow B\rightarrow C\rightarrow A$$. Here $$A\rightarrow B$$ is isobaric $$B\rightarrow C$$ is adiabatic and $$C\rightarrow A$$ is isothermal

The pressure at $$C$$ is given by $$(\gamma=1.5)$$

Pressure of an ideal gas is increased by keeping temperature constant. The kinetic energy of molecules.

Water does not freeze at the bottom of the lakes in winter because :

A steel scale gives correct reading at $$t_1 ^oC$$. When temperature changes to $$t_2 ^oC$$, then :

A physicist says "a body contains $$10\ joule$$ heat" but a physics learner says "this statement is correct only when the body is in liquid state". Mark correct option or options :

A metal rod of length $$L$$ and cross-sectional area $$A$$ converts a large tank of water at temperature $$\theta_{0}$$ and a small vessel containing mass $$m$$ of water at initial temperature of $$\theta_{1}(< \theta_{0})$$. If the thermal conductivity of rod is $$K$$, then the time taken for the temperature of water in smaller vessel to become $$\theta_{2}(\theta_{1} < \theta_{2} < \theta_{0})$$ is:
(Given : Specific heat capacity of water is $$s$$ and all other heat capacities are neglected).

In which of the following phenomena do heat waves travel along a straight line with the speed of light ?