Which one of the following statements is true? a) An orbit and orbital mean the same thing. b) An orbit and orbital contain the same number of electrons always. c) The energies of the orbit and the orbital are the same. d) The maximum number of electrons present in an orbit and an orbital will be different.

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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