A vessel containing 10 litres of air at atmospheric pressure (760 mm of Hg) is connected with an evacuated vessel of capacity 9 litres. The resultant air pressure will be
180 mm
760 mm
400 mm
40 mm
The average kinetic energy of a gas molecule at 27o C is 6.21 x 10-21 J. Its average kinetic energy at 227o C will be
The temperature of a thin rod is slightly increased by If the coefficient of linear expansion be , then its moment of inertia I about the perpendicular bisector will change by :
