4200 J of work is required for

20 J work is required to stretch a spring through 0.1 m. Find the force constant of the spring If the spring is further stretched through 0.1 m, calculate work done

20 J work is required to stretch a spring through 0.1 m . Find the force constant of the spring. If the spring is further stretched through 0.1 m. Calculate work done.

How much will the temperature of 100g of water be rised by doing 4200 J of work in stirring the water?

The potential energy of a certain spring when streched by a distance x is 20J. The amount of work required to strech it through an additional distance x is:

A certain spring that obeys Hook's law is stretched by an external agents. The work done in stretching the spring by 10 cm is 4 J . How much additional work is required to stretch the spring an additional 10 cm ?

Heat of 30 kcal is supplied to a system and 4200 J of external work is done on the system so that its volume decreases at constant pressure. What is the change in its internal energy. (J=4200 J/kcal)