What is refraction of light?
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Define Fixation of Nitrogen?
Why dies a small quantity of air introduced into the top of the barometer tube depress the level of mercury ?
Why dies a piece of iron sink in water, while a ship remains floating ?
Is exothermic reaction useful in Lasing process? give reasion of ur answere?
Explain what is a crest?
Which waves are used in sonography?
Define Newton's third law of motion?
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Explain the Solids ?
Explain the Liquids ?
Which is heavier the land mass or the sea?
Explain the Velocity ?