Find the radius of an aluminum cylinder that is 2.00 cm long and has a mass of 12,4 g. For a cylinder, V=πr^2h

Thank you

Would I just need to find the density of aluminum at room temperature?

Printable View

- Jan 17th 2010, 05:01 PMthebristolsound
Find the radius of an aluminum cylinder that is 2.00 cm long and has a mass of 12,4 g. For a cylinder, V=

*πr^2h*

*Thank you*

Would I just need to find the density of aluminum at room temperature? - Jan 17th 2010, 11:14 PMGrandad
Hello thebristolsoundYes, you will certainly need the density. Then use:

$\displaystyle \text{volume }= \frac{\text{mass}}{\text{density}}$When you have the volume, solve the equation

$\displaystyle V = \pi r^2h$for $\displaystyle r$; namely:

$\displaystyle r =\sqrt{\frac{V}{\pi h}}$Can you do it now?

Grandad