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A current flows in a conductor from east to west. The direction of the magnetic field at a point above the conductor is _______.
A cubical vessel of height 1 m is full of water. What is the amount of work done in pumping water out of the vessel?
(Take g =10 m/s2)
A person of mass 60 kg is inside a lift of mass 940 kg and presses the button on control panel. The lift starts moving upwards with an acceleration of 1.0 m/s2. If g = 10 m/s2, the tension in the supporting cable is
A motorboat covers a given distance in 6 hours moving downstream on a river. It covers the same distance in 10 hours moving upstream. The time it takes to cover the same distance in still water is ______.
A balloon is rising vertically up with a velocity of 29m/s2. A stone is dropped from it and it reaches the ground in 10 seconds. The height of the balloon when the stone was dropped from it is (g = 9.8 m/s2)
A bullet moving with a speed of 100 ms-1 can just penetrate two planks of equal thickness. Then, the number of such planks penetrated by the same bullet when the speed is doubled in will be _______.
A missile is fired for maximum range with an initial velocity of 20 m/s. If g = 10 m/s-2, the range of the missile is
92U235 undergoes successive disintegrations with the end product of 82Pb203. The Number of a and b particles emitted are
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