Posted by **mohammad** on Saturday, November 12, 2011 at 12:35am.

Water flows through a 1.2 cm diameter pipe into a 155 L bathtub, which it fills in 8 min.What is the speed of the water in the pipe?

- physics -
**mohammad**, Saturday, November 12, 2011 at 2:13pm
We know our diameter is 1.2cm so our radius is 0.6 cm or 0.006 m. Now we find our volume flow rate, Q. so 155l/8min * 1min/60s *1m^3/1000L = 3.2292*10^-4 m^3/s.

Velocity= Volume flow rate/Area

V=Q/A

V= 3.2292*10^-4 m^3/s

- physics -
**mohammad**, Saturday, November 12, 2011 at 2:14pm
sorry. here is complete answer.

We know our diameter is 1.2cm so our radius is 0.6 cm or 0.006 m. Now we find our volume flow rate, Q. so 155l/8min * 1min/60s *1m^3/1000L = 3.2292*10^-4 m^3/s.

Velocity= Volume flow rate/Area

V=Q/A

V= 3.2292*10^-4 m^3/s/ pie*((6*10^-3)^2)

V=2.8 m/s

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