If a, ß are the roots of the quadratic equation x2+ax+b=0, (b?0); then the quadratic equation whose roots are a - 1 , ß - 1 is ß a (A) ax2+a(b–1)x+(a–1)2=0 (B) bx2+a(b–1)x+(b–1)2=0 (C) x2+ax+b = 0 (D) abx2+bx+a = 0

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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