Shall i get Section engineer S & T question paper? (Railway
recruitment board)
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Explain about Ultraviolet rays?
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The system shown in the figure is in equilibrium. The metal spheres are identical and each has a mass of 2 kg. The surface areas of the pistons are equal and 100 square centimeters each. The density of water is 1 g per cubic centimeter. Assuming that the frictions and masses of the pistons are negligible, what is the mass of G? ( g = 10N/kg )
why ac is attractive and dc is repulsive?
What is speed of sound through water?
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sound frequencies below 16 hertz are usually referred to by scientists as:
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