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I've been given a question which asks to calculate the kinetic energy of gas flowing through a pipe given the density(kg/m^3), pipe diameter(m) and velocity(m/s).

I'm first required to find the flow rate(m^3/s) then find the kinetic energy(Joules) of the stream.

Any formulas or advice about how to approach this question would be greatly appreciated?

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Apply the continuity equation: mass in is equal to mass out

so (density * area * speed) for the inlet is equal to the (density * area * speed) for the outlet.

Do make sure that the units used are coherent. Then consider laminar or turbulent flow.

Also links like this may help: https://myengineeringtools.com/Piping/Fluid_Velocity.html

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