The frequency of vibration of a string cab be increased by (a) Increasing the length of the string keeping the tension constant (b) Decreasing the density of the string keeping the tension constant (c) Increasing the thickness of the string keeping the length constant (d) Decreasing the tension of the string keeping length constant

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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