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Q. During lightning, it is safer to sit inside car than in an open ground. Why?
The metal body of the car offers electrostatic shielding where the electric field is zero. Throughout lightning the electric discharge passes through the body of the car.
A ball leaves a girl's hand with an upward velocity of 6 meters per second. What is the maximum height of the ball above the girl's hand? Ans: A ball leaves a girl's hand w
what is azimuth angle?
(a) Potential energy : An electron operates some potential energy due to this found in the field of nucleus potential energy of electron in nth orbit of radius rn is given by
When royce was 10 years old he had a mass of 30kg by the time he was 16 years old his mass increase to 60kg how much larger is the gravitational force between royce and earth at a
Assume a crane lifts a 900 kilogram wrecking ball 12 meters above a concrete slab. 105,840 Joules of potential energy are kept in the wrecking ball. Now the ball is dropp
what is succcessive radioactive disintegration
When the economy experiences a downfall, the government knows exactly which policies will spur an economic recovery. Often policymakers fail to take the right decisions for both
Show that the heat transferred during an in nitesimal quasi-static process of an ideal gas can be written as dQ = Cv nR V dP + Cp nR PdV: Apply this equation to an adiabatic proces
A current transformer has two turns on the primary winding and a secondary winding of 260 turns. The secondary winding is connected to an ammeter with a resistance of 0.2.The
A ball dropped from a balloon at rest clears a tower 81m high during the last quater second of its journey. Find the height of the balloon and the velocity of the body when it rea
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