A charged particle moves through a magnetic field perpendicular to its direction.then a)the momentum changes but the kinectic energy is constant b)both momentum and kinetic energy of the particle are not constant c)both,momentum and kinectic energy of the particle are constant d)kinectic energy changes but the momentum is constant

in a physics laboratory a block x is balanced by a block Y of mass 200 kg,each are suspended from a balance of equal lever arms .the scale pan on X is at a height.H1=2 cm ,where as scale pan on Y is at height 1 cm above the floor.the error in weighing is (in gram)

consider the figure of a single riveted lap joint as follows

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cyclic heat engine operates between. temperature of 30 C. What is the least rate of heat rejection per kW net output of an engine. source temperature of 800 C and sink

 

 

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