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# Please help with physics!?

a pipe radius of 0.0100 m carries water at 2.33 m/s. How much time does it take to fill up a 1.00m^3 fish tank? (unit=s)

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- FiremanLv 72 months ago
BY Q = Av

=>Q = πr^2 x v

=>Q = 3.14 x (0.01)^2 x 2.33

=>Q = 7.32 x 10^-4 m^3/sec

Let the time to fill 1 m^3 tank is t sec

=>t = V/Q

=>t = 1/(7.32 x 10^-4)

=>t = 1366.83 sec OR 22 min & 46.83 sec

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- oubaasLv 72 months ago
flow Q = V*A = 23.3 dm/sec*0.7854*0.2^2 dm^2 = 0.732 liters/sec ..(0.7854 = PI/4)

time t = V/Q = 1000 liters / 0.732 liters/sec = 1366 sec

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- Anonymous2 months ago
V = v π r^2 t

then

t = V / (v π r^2)

t = 1 / (2.33*3.14*0.01^2) = 1366.8 s = 22 min 47 s

- Mia2 months agoReport
thank you very much! I appreciate the help!

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