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We have a pressurized Water-jet stream, where the nozzle d= 0.8 mm. We can measure the fluid output in mm

^{3}/s, to determine the speed by dividing over the area.

For this, F=ρAv

^{2}

However, the variable that would be changing, would be the distance from the nozzle to the target. If we assume that as long as the water-jet stream maintains coherence, A

_{1}=A

_{2}, therefore cancelling A for P=F/A, would the simplified formula:

P=ρv

^{2}

Be correct (if we do not want to be overly particular of effects that might not alter this formula in a significant way)?

Thanks,

Adbury