There is a gas in a sphere of radius `2r` at a pressure P. If the same amount of gas is present in another sphere of radius r at same temperature, find its pressure.

The volume of a sphere of radius 2r is

At same temperature and pressure of an ideal gas

The radius of gyration of a sphere of radius R about a tangent is.

A gas in a sphere of radius 2r is transferred to another sphere of radius r. Find the pressure after transferring if initial pressure is P.

Assertion : A solid sphere of copper of radius R and a hollow sphere of the same material of inner radius r and outer radius R are heated to the same temperature and allowed to cool in the same environment. The hollow sphere cools faster. Reason : Rate of cooling is according to Stefan's law which is E alpha T^(4)

Amount of heat radiations emitted by a solid sphere of radius r at any temperatures is proportional to the following .?

A solid sphere of copper of radius R and a hollow sphere of the same materail of inner radius r and outer radius A are heated to the same temperature and allowed to cool in the same environment. Which of tehm starts cooling faster?

A sphere of radius r has the same volume as that of a cone with a circular base of radius r. Find the height of the cone.

If a sphere of radius 2r has the same volume as that of a cone with circular base of radius r , then find the height of the cone.