.Newton's rings are observed by keeping a spherical surface of 100cm radius on a plane glass plate. The wave length of light used is 5880Å.If the diameter of the 15th bright ring is 0.59cm, the diameter of the 5th ring isa) 0.226cmb) 0.446cmc) 0.336cmd) 0.556cm

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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