itsprevious year Q plz solve this.\nA coin is placed on a horizontal platform which undergoes vertical simple harmonic motion of angular frequency ?. The amplitude of oscillation is gradually increased. The coin will leave contact with the platform for the first time ?help me

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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