Nitric acid can be obtained from ammonia via the formations of the intermediate compounds (A) Nitric oxides and nitrogen dioxides (B) Nitrogen and nitric oxides (C) Nitric oxide and dinitrogen pentoxide (D) Nitrogen and nitrous oxide

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