Li occupies higher position in the electrochemical series of metals as compared to Cu since A. the standard reduction potential of Li+ / Li is lower than that of Cu2+ / Cu B. the standard reduction potential of Cu2+ / Cu is lower than that of Li+ / Li C. the standard oxidation potential of Li+ / Li is lower than that of Cu / Cu2+ D. Li is smaller in size as compared to Cu

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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