Explain the difference between collector & emitter of transistor, even though material used for both same?

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Explain what is centrifugal force?

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A man asks his friend to meet him at the airport at 3.00pm,to drive him to an appointment.he catches an earlier plane,and arrives at the airport at 2.00pm.he decides to start walking and is picked up en route by his friend.he arrives twenty minutes early for his appointment.how long did he walk?

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Explain the Optical Medium ?

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battery of 180 AMP HOUR”

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What is the Spectrum?

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What formula is most appropriate to compute the kinetic energy of a block of ice sliding down an inclined plane?

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Explain the Photometry ?

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Why does the specific gravity of milk increase, when cream is removed from the milk ?

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Physicists most commonly call a mass moving in a straight line path as having:

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the resolutions of a michelson interferometer operating with a light source of 640nm wavelenth is A.1280nm B.640nm C.80 nm D.1nm

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explain Tides

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