Posted by cindy on Sunday, November 30, 2008 at 4:07pm.
(a) density = (Mass)/(Volume)
= [3/(4 pi)]*Mass/(radius)^3
(b) Multiply the density that you get in (a) by the volume of a dime (2*10^-7 m^3). That will give you the mass in kg. Multiply that by 2.2 lb/kg for the weight in pounds. (They want you to assume that the dime is on the Earth, with acceleration of gravity 9.8 m/s^2.)
It would be so heavy that it would probably sink to the center of the Earth. You might want to compare the mass of the dime to the mass of the Earth.
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