Can someone rearrange this formula for H please?
V= pi*h((c^2)/8 + (h^2)/6)
Cheers,
David
Is it possible?
What a splendid arrangement!
H = 2268chhpiV^^//+= *((()))
I think its
h = sqrt(6*((v/(pi*h))-((C^2)/8))
some one check my working please
I agreee with your working so far but I suppose it is not a lot of help with h on both sides of the equation.
Will ask around the office see if anyones maths is up to it.
quote:
Originally posted by Sporty
I agreee with your working so far but I suppose it is not a lot of help with h on both sides of the equation.
Will ask around the office see if anyones maths is up to it.
ignoring previous attempt, got it now
I think
h = sqrt (6(V/(pi^2(c^2/8)))
again check the working and laugh at me again
nib1980,
I think you get, h = +/- sqrt((6/v)-(6/(8*pi))*c^2)
Dan
[Edited on 20/3/07 by Bluemoon]
quote:
Originally posted by Bluemoon
nib1980,
I think your correct, I get, h = +/- sqrt((6/v)-(6/(8*pi))*c^2)
Dan
it is a quadratic in h so it is 6*(-pi*(c^2)/8+/- sqrt(pi^2c^4/64 + 4V/6)
Difficult to do analytically, see cubic equation in wikipedia, as methods depend a bit on the values (unlike the quadratic formula which is nice and
simple).
If you have values that you can plug in then, first rearrange to
8hhh + 0 hh + 6cc h - 48V/pi = 0
then plug into the 8, 0, 6cc and -48V/pi into the solver at
http://www.akiti.ca/Quad3Deg.html
Alternatively you can battle through the wikipedia maths, but it doesn't look like fun to me.
Matt
Opps, I thought that was a pih/(.....).. I'll get my coat..
As pointed out it's actually a qubic equation, and I think you can only solve it using an iterative method...
Dan
But having read, bit looks like you can solve it but it's not easy!
[Edited on 20/3/07 by Bluemoon]
Thanks guys, its not possible to rearrange it anyway according to our maths geniuses, managed to sort it out now anyway. Was trying to work out some
combustion chamber volumes for one of the technicians at uni.
Thanks for the help
David
straight over my head!
Just reading this thread has given me a head ache, think I'll go and lie down. 
Ray
"Was trying to work out some combustion chamber volumes for one of the technicians at uni. "
Glad I've got a measuring cylinder! Being that clever is too much like hard work. 
quote:
Originally posted by Confused but excited.
"Was trying to work out some combustion chamber volumes for one of the technicians at uni. "
Glad I've got a measuring cylinder! Being that clever is too much like hard work.