A body of mass 500 gm is suspended from the end of a steel wire 1m and having cross sectional area of 1mm^2 . the other end of the wire is fixed to a rigid support . The body is moved side-ways, till the wire makes an angle of 60 with the vertical and then released. Find the increase in length of the wire when the body is vertically below the point of suspension.[ Y = 2 x 10^11 N/m^2 ]

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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