The length of a telescope is 100 cm and magnification is 19. The focal length of the objective and eye piece are a) 90 cm and 10 cm b) 85 cm and 1 cm c) 95 cm and 25 cm d) None of the above

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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