Write the different components of soap. Why do soaps not work in hard water?

Write the constituents of shaving soap.

What are the different components of a TV signal? Write down the bandwidth of speech and TV signal.

Why do electrostatics not work well in humid days ?

Two vessels have the same base area but different shapes. The first vessel takes twice the volume of water that the second vessel requires to fill upto a particular common height. Is the force exerted by the water on the base of the vessel the same in the two cases? If so, why do the vessels filled with water to that same height give different readings on a weighing scale?

Why are detergents preferred over soaps?

Why are synthetic detergents preferred to soaps in washing machines?

Explain why (a) Two bodies at different temperatures T_1 and T_2 if brought in thermal contact do not necessarily settle to the mean temperature (T_1, + T_2)//2 .