The work done per unit volume in stretching a wire is equal to

What is work done?

Show that the pressure exerted by unit volume of a perfect gas is equal to two thirds of the total kinetic energy of the gas molecules.

Two wires of same radius and legth are subjected to the same load . One wire is of steel an the other is of copper . If the young modulus of steel is twice that of copper find the ratio of elastic energy stored per unit volume in steel to that of copper .

Two spring have their forces constants as K_1 and K_2 (K_2 > K_2) . The work done, when both are stretched by the same amount of length will be

Is work done a vector quantity?

Show that work done by a stretching force in producing an extension in the wire is given by W=frac(1)(2)xx stretching force xx extension .

What is the work done by the tension of the string in a simple pendulum?

A positive charge Q is located at a point. What is the work done if a unit positive charge is carried once, completely round the charge along a circle of radius r about this point ?

Show that the work done by an external force in bringing a unit positive charge from infinity to a point is equal to electrostatic potential (V) at that point.

The mass per unit volume of a substance is called density. (Density = mass/volume). Arrange the following in order of increasing density- air, exhaust from chimneys, honey, water, chalk,cotton and iron.