1) Two containers P and Q of equal volume (1 litre each) contain 6 g of O₂ and SO₂ respectively at 300 K and 1 atmosphere, then

a) Number of molecules in P is less than that in Q

b) Number of molecules in P and Q is same

c) Number of molecules in Q is less than that in P

d) Either (a) or (b)

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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