1.the largest wavelength in the ultraviolet region of the the hydrogen spectrum is 122nm. the smallest wavelength in the infrared region of the spectrum (to the nearest integer)is a)1648 nm b)823 nm c)1882 nm d)802 nm

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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