Ask Me Help Desk - Rearanging formulas

Hi,

Nice to meet you all. I have a question to ask that I hope some people may be able to help me with. I am a college student studying BTEC Opps and Maint Engineering. I have had a lot of problems with maths in the past but am finally getting to know it, but I have a major issue with rearranging formulas and most stuff that we get given needs to be rearranged.

Anyway I hope some of you may be able to point me in the right direction of how exactly to do it. I know rearranging simple equations like ohms law but this equation I have at the moment is tricky.

The velocity of gas measured by a Pitot Static Tube is given by the equation:
lllllllllllllllllllll__________
Vgas = √2 Pdynamic * C
lllllllllllllllllllllllllllllllllρ

I need to rearrange that formula to allow me to work out the expected dynamic pressure be making P the subject of the formula.

Any advice be gratefully appreciated,

Thanks for your time

You must solve this for P?

$V=\frac{\sqrt{2P}C}{{\rho}}$

If so,

Multiply both sides by rho:

$V{\rho}=\sqrt{2P}C$

Divide by C:

$\frac{V{\rho}}{C}=\sqrt{2P}$

Square both sides:

$(\frac{V{\rho}}{C})^{2}=2P$

Divide by 2:

$P=\frac{({\rho}V)^{2}}{2C^{2}}$

Hi glactus,

Thank you very very much for your post, I have found this very useful as I have studdied your steps to allow me learn how to rearange better.

Thanks a bunch! *

Quote:

Originally Posted by Arkious

Hi glactus,

Thank you very very much for your post, i have found this very useful as i have studdied your steps to allow me learn how to rearange better.

Thanks a bunch! *

As long as you do the same thing to both sides, you can't go wrong! :)