A metallic rod breaks when the strain produced in the rod is 0.2%. What should be the are of cross section to support a load of 104N, if the Young’s modulus of the material of the rod is 7 × 10^9 N/m^2? (a) 7.15 × 10^-4 m^2 (b) 3.15 × 10^-5 m^2 (c) 2 × 10^3 m^2 (d) 12 × 10^-4 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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