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Explain why?The size of the middle of a syringe controls flow rate better than the thumb pressure exerted by a doctor while administering an injection |
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Answer» Here, size of the needle controls velocity of flow and thumb pressure controls pressure. According to Bernoulli's theorem. ρ + ρgh + 1/2ρv2 = a constant, shows that ρ occurs with powers one and v occurs with power two, hence the velocity has more influence. That is why needle has a better control over flow. |
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