Hi

where and

0.988\:V)^3 = c'" alt="1.03\:P\0.988\:V)^3 = c'" />

The approximate % change in c is -0.66%

Results 1 to 2 of 2

- March 13th 2009, 05:31 AM #1

- Joined
- Jul 2008
- Posts
- 12

## need some help please cheers

got this question:

Pressure P and V are related by c . V cubed = c, where c is a constant.

Determine the approximate % change in c when p is increased by 3% and v is decreased by 1.2%

suggested answer:

( P = 1 ) x (V = 1 ) cubed = C (which is 100%)

Therefore (( P + 3%) x (1 - 1.2%)) Cubed = Cn

(1.03 x 0.988) Cubed = 1.053

then you would take Cn from C to get the aproximate % change.

is this right??

- March 13th 2009, 06:37 AM #2

- Joined
- Nov 2008
- From
- France
- Posts
- 1,458