Which of the followings is correct? A. Evaporation of water causes an increase in disorder of the system B. Melting of ice causes a decrease in randomness of the system C. Condensation of steam causes an increase in disorder of the system D. There is practically no change in the randomness of the system when water is evaporated

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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