Which of the following is the evidence to show that there must be a force acting on earth and directed towards the sun?

(A) Deviation of falling bodies towards east

(B) Revolution

(C) Phenomenon of day and night

(D) Apparent momentum of sun around the earth

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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