Thermal Propert...

Lake water never completely freezes because

In experiment of heat transfer by convection, water inside the pipe completely gets heated (with the application of heat source). This can be explained best by which of the following statements,

Two identical containers P and Q with frictionless piston contain the same ideal gas at the same temperature and the same volume. The mass of gas in P is $$m_1$$ and that in Q is $$m_2$$. The gas in each cylinder is now allowed to expand isothermally to the same final volume $$1.5$$V. The changes pressure in P and Q are found to be $$\Delta$$p and $$2\Delta$$p respectively then.

Two conductors of the same material have their diameters in the ratio $$1:2$$ and their lengths in the ratio $$2:1$$. If the temperature difference between their ends is the same, then the ratio of amounts of heat conducted per second through them will be.

In a mercury thermometer, the ice point is marked as $$10^o$$ and the steam point is marked as $$130^o$$. At $$40^oC$$ temperature, what will this thermometer read (in degrees)?

_____ surface absorbs more heat that any other surface under identical conditions.

A body of specific heat $$0.2$$ kcal$$/kg^o$$C is heated through $$100^o$$C. The percentage increase in its mass is?

During an experiment an ideal gas is found to obey an additional law $$V{p}^{2}=$$ constant. The gas is initially at temperature $$T$$ and volume $$V$$, when it expands to volume $$2V$$, the resulting temperature is $$T_2$$:

An ideal gas follows a process described by $$PV^2=C$$ from $$(P_1, V_1, T_1)$$ to $$(P_2, V_2, T_2)$$ (C is a constant). Then.

The temperature of water at the surface of a deep lake is $${2}^{0}$$ C. The temperature expected at the bottom is