A charged particle of charge +q and mass m is initially at rest at the origin of the co-ordinate system and at time t=0 a constant electric field Ei^ and constant magnetic field Bj^ are switched on.Find (1)Maximum speed of particle along x axis.(2) Maximum speed of particle along y axis.(3)velocity vector of particle at a general point of co-ordinate (x,y,z).

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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