Thursday

April 24, 2014

April 24, 2014

Posted by **Anonymous** on Thursday, January 31, 2013 at 7:44am.

- maths -
**Reiny**, Thursday, January 31, 2013 at 10:06amfind volume of the shell

r1 = 10 m = 1000 cm = 10000 mm

V1 = (4/3)π(10000)^3 = ....

r2 = 10000 - 20 = 9980 mm

V2 = (4/3)π(9980)^3 = ....

volume of shell = V1 - V2 = ....

7850 kg/m^3

= 7850000 g/(100^3 cm^3)

= 7.85 g / cm^3

= .00785 g/ mm^3

I will let you do all the button-pushing

Use the memories in your calculator, don't round off any intermediate numbers, let your machine do the work for you

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