When using symbolic solver I seem to get the strange answer.

 eqn=A*Cd*sqrt((2*P)/r)==Q
eqn = 
2^(1/2)*A*Cd*(P/r)^(1/2) == Q 
>> solve(eqn,Cd) 
ans = 
(2^(1/2)*Q)/(2*A*(P/r)^(1/2))

...Not sure where the sort(2) on the top comes from? Thanks

Answer 1

[Torsten]

2^(1/2) / 2 = 1 / 2^(1/2) ...

Best wishes

Torsten.