How many images will be formed if the angle between two
mirrors is 90o ?
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When the sound intensity is above 120 decibel, what happen to human ears?
How is sound produced?
State Laws Of Conservation Of Energy?
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When a toy balloon is filled with air and then the air is allowed to go out, why dies the balloon whiz away ?
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A coil consisting of 200 turns of wire has its ends connected to a circuit such that the total resistance of the coil and the circuit is 2.0 ohm. There is no source of e.m.f. in the circuit. Each turn of the coil is a square of side 18 cm, and a uniform magnetic field directed perpendicular to the plane of the coil is turned on. If the field changes linearly from 0 to 0.5 T in 0.8 s, what is the magnitude of the current in the coil while the field is changing?
the magnifying power of a simple microscope can be increased if we use eye piece of
The magnitude of electrostatic force between two identical positive ions that are separated by a distance of 5.0 x 10– 10 m is 3.7 x 10–9 N. (a) What is the charge of each ion? (b) How many electrons are “missing” from each ion?
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Why it becomes bitterly cold as soon as the snow starts melting?