Explain one advantage of a scanning electron microscope over a transmission electron microscope?

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Which is the sound wave that is below the human hearing?

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What is Virtual image ?

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Explain the Evaporation ?

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i measured a 3-ph capacitor with a multimeter which is not connected to supply... but i could get the phase to phase voltage... how tis is possible..????

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When a bicycle is in motion, the force of friction exerted by the ground on the two wheels is such that it acts a) In the backward direction on the front wheel and in the forward direction on the rear wheel. (b) In the forward direction on the front wheel and in the backward direction on the rear wheel. (c) In the backward direction on both the front and rear wheels. (d) In the backward direction on both the front and rear wheels.

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Is negative mass antimatter?

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What is the principle of superposition?

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Explain the Effect of Temperature on Vapour Pressure ?

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Why is lighting conductor used ?

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What do you know about Absolute Zero?

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Explain the Air Pressure Machines ?

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