Four steel wires of the following dimensions are stretched with the same force. Which one of them will have the largest extension?(a) L1 = 50 cm, r1 = 0.5 mm(b) L2 = 100 cm, r2 = 1 mm(c) L3 = 200 cm, r3 = 2 mm(d) L4 = 300 cm, r4 = 3 mm

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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