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Figure shows a siphon , which is a device for removing liquid from a container. Tube ABC must initially be filled , but once this has been done , liquid will flow through the tube until the liquid surface in the container is level with the tube opening at A . The liquid has density 1000 kg//m^(3) and negligible viscosity . The distances shown are h_(1) = 25 cm d = 12 cm and h_(2) = 40 cm If the atmospheric pressure is 1.0 xx 10^(5) Pa, what is the pressure in the liquid at the topmost point B ? |
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Answer» SOLUTION :Since `v_(B) = v_(C)` by equation of CONTINUITY , and `p_(C) = p_(air)` , Bernouli.s equation becomes `p_(B) = p_(C) + rho g (h_(C) - h_(B)) = p_(air) - rho g (h_(1) + h_(2) + d)` `= 10 xx 10^(5) Pa - (1.0 xx 10^(3)kg//m^(3)) (9.8 m//s^(2)) xx (0.25 m + 0.40 m + 0.12 m)` `= 9.2 xx 10^(4)` Pa |
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