physics

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physics

Postby jenai » Mon Nov 20, 2006 10:54 am

how am i going to calculate the volume of the earth?
jenai
 

Re: physics

Postby Guest » Mon Nov 20, 2006 10:55 am

jenai wrote:how am i going to calculate the volume of the earth?
Guest
 

Postby brian121 » Thu Feb 08, 2007 10:47 am

The volume of Earth is 1,083,206,246,123,080,894,852 m3, or around 1.0832×1021 m3, in scientific notation.

Calculation

Earth is an oblate spheroid, resembling a sphere flattened at the poles.

The volume of an oblate spheroid is

V = \frac{4}{3}\pi a^2 b

where π is the mathematical constant pi, and a and b are the equatorial and polar radii.

Substituting a = 6,378,135 m and b = 6,356,750 m, we get the above Earth volume.
brian121
 
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Joined: Sun Feb 04, 2007 3:24 pm


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