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Old Nov 22nd 2009, 04:00 PM   #1
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density,volume,mass

a solid aluminium rod of length 1.2mhas a uniform diameter of 52mm. The density of aluminium is 2700kgm-3 ...calculate

(a) its volume in m^3
(b) its mass in kg


any help much appreciated
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Old Nov 22nd 2009, 04:06 PM   #2
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a= 0.0025484 m^3
b=6.88176 kg


a solid aluminium rod of length 1.2mhas a uniform diameter of 52mm. The density of aluminium is 2700kgm-3 ...calculate

(a) its volume in m^3
(b) its mass in kg


any help much appreciated

Last edited by Paul46; Nov 22nd 2009 at 04:22 PM. Reason: mistake
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Old Nov 22nd 2009, 07:37 PM   #3
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Density = mass/volume.
You are given the dimensions of the cylinder so you can work out the volume. (Do you know how to?).
Once you've done that, you have the density and the volume, using the first equation I gave you can get the mass.
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Old Nov 23rd 2009, 03:10 AM   #4
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i should be able to manage that.im just not familiar with the prefix 1.2mhas? thanks
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Old Nov 23rd 2009, 06:51 AM   #5
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Originally Posted by decoy808 View Post
i should be able to manage that.im just not familiar with the prefix 1.2mhas? thanks
The length of the rod is 1.2 meter.
The sentence should read "a solid aluminium rod of length 1.2m has a uniform diameter of 52mm."
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