Quote:
Originally Posted by Les
Evidence please.
It is a new concept to me.
Think is crap but I am open to elucidation
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Pump adds kinetic energy to water. This energy is being lost bit by bit at each piece of kit (pressure loss).
Play with
Bernoulli Law equations (using simplified set of condtions as described in your favorite physics compendium

) -> as pressure drops velocity drops *hint, hint* - just play with supplied calculator to check it if ya want Les.
I am not able to produce any other evidence and I deem this to be as conclusive as possible.