When a green colored object is illuminated by a green light it will appear as what color to the human eye?
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whether man or women came first on earth
In general, alternating voltage varies between its maximum and minimum values 50 times per cycle. Why don't the circuit element show such fluctuation?
Why are morning and evening less warm than noons ?
Why is the earth not used as a return wire in a telephone system, while it is dine so in case of telegraph system.
Which lens is used for correcting long ?sightedness ?
How does a sound wave travel in air?
whether egg or hen came first
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?
Why dies a small quantity of air introduced into the top of the barometer tube depress the level of mercury ?
Why does a piece of ice make drink colder?
Explain the Reflection ?
What is supersonic?