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Scalars and the Need for Vectors

Water flows a...

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Water flows along horizontal pipe of non uniform cross section. The pressure is 1 cm of Hg where the velocity is 35 cm/s. At a point where the velocity is 65 cm/s , the pressure will be: A. 0.89 cm of Hg. B. 0.62 cm of Hg. C. 0.5 cm of Hg. D. 1 cm of Hg.

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