The thermo e.m.f. of a thermo-couple is 25 ? V/C at room temperature. A galvanometer of 40 ohm resistance, capable of detecting current as low as 10 5 A, is connected with the thermocouple. The smallest temperature difference that can be detected by this system is

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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