How do I change P=10nQH to be Q= this one has me completely stumped:mad:



DD

Your question here is quite difficult to understand...

Is it



of is there some power?

Hi Thanks for reply the formula is used in hydro electric systems to work out the power in kw the system will provide. N is the efficiency of the turbine, Q the amount of water in cubic meters per sec and H the head of water. I need to find out the amount of water Q to give a given power output
Hope this is more info for you
Cheers dave

What I guess is a simple algebra changing the subject of formula:



I don't know if that is the real answer though, for it seems quite simple.. :confused:

Thanks for that, its is what I thought it should be. This is one area of maths that gets me lost, I just hope that I do not get one in my exam later in the year.

Oh, that was what you were looking for then!

Let me explain how you come to it:



Divide everything by 10nH;



You'll see that 10/10 = 1, n/n = 1, H/H= 1;