Let n be a natural no. and let a be a real no. The no. of zeroes of x raised to 2n + 1 - ( 2n + 1) x + a = 0 in the interval of [ -1 , 1] is A) 2 if a>0 B) 2 if a<0 C) at most one for every value of a D) at least 3 for every value of a

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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