Q is inversely proportional to the cube of T

When T=5, Q=12.6

$\displaystyle 5^3=125$

It's as if someone added a decimal point and then added a 0.1 although it is never so with maths....thankfully.

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- Jan 5th 2010, 08:49 AMMukilabInversely proportional!?!
Q is inversely proportional to the cube of T

When T=5, Q=12.6

$\displaystyle 5^3=125$

It's as if someone added a decimal point and then added a 0.1 although it is never so with maths....thankfully. - Jan 5th 2010, 09:10 AMSoroban
Hello, Mukilab!

Do youunderstand proportionality?*really*

Quote:

$\displaystyle Q$ is inversely proportional to the cube of $\displaystyle T$.

Quote:

When $\displaystyle T=5,\;Q=12.6$

Therefore: .$\displaystyle Q \:=\:\frac{1575}{T^3}$

- Jan 5th 2010, 10:14 AMMukilab
- Jan 5th 2010, 11:08 AMdkaksl
Proportionality afaik requires a variable equal to another variable multiplied (or divided) by a constant.

$\displaystyle X=kV$ ; $\displaystyle X$ is proportional to $\displaystyle V$. An inverse proportionality would be $\displaystyle X=\frac{k}{V}$

So the constant $\displaystyle k$ either has to be given, or you need to be able to calculate it from the information you have. - Jan 5th 2010, 11:14 AMMukilab
- Jan 5th 2010, 11:31 AMdkaksl
They did mention it was inversely proportional, right? That means;

Quote:

Originally Posted by**Soroban**