A shell initially at rest explodes into two pieces of equal mass. Then the two pieces will be

(A) at rest

(B) move with same velocity in opposite directions

(C) move with same velocity in same direction

(D) move with different velocities in different directions

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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