Calculate the surface area in (sq m) of a catalyst that adsorbs 103cm3 of nitrogen redu
A long straight wire carries an electric current of 2A. The magnetic induction at a perpendicular
Parallel rays of light of intensity I=912 Wm-2 are incident on a spherical block
A crane is used to lift 10000 kg of coal from a mine 100 m deep. If the time taken by the crane i