Three perfect gases at absolute temperatures T1, T2 and T3 are mixed. The masses of molecules are m1,m2 and m3 and the number of molecules are n1, n2 and n3 respectively. Assuming no loss of energy, thefinal temperature of the mixture is ?

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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