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#1
01-19-2007, 08:34 AM
 Unregistered Guest Posts: n/a
calculating the density of a sphere

If someone can explain this to me I would greatly appreciate it.
volume=4/3pi r3

my diameter is 4.2

#2
01-21-2007, 09:49 PM
 Robert Fogt Administrator Join Date: Dec 2005 Location: Seattle, WA Posts: 3,467 Rep Power: 13
Re: calculating the density of a sphere

We actually have a calculator up for that here:
http://www.onlineconversion.com/obje...ume_sphere.htm

If your measurement is in inches, the volume will be cubic inches. If your measurement is meters, the volume cubic meters. etc.
#3
05-23-2008, 03:39 PM
 Unregistered Guest Posts: n/a
Re: calculating the density of a sphere

I have a small question...
I am a senior in high school, and I am having a problem comprehending the formula for calculating the density of a solid sphere. I was wondering if anyone would be able to help me out.
#4
05-24-2008, 07:55 AM
 JohnS Moderator Join Date: Dec 2007 Location: SE Michigan, USA Posts: 9,534 Rep Power: 19
Re: calculating the density of a sphere

For any shape, density = mass/volume.

So you need to measure the sphere's mass on a scale, then measure it's diameter, divide by 2 to get radius, and compute volume per the formula given above.

What problem are you having? Can you be more specific?
#5
10-18-2010, 03:16 PM
 Gagan Guest Posts: n/a
Re: calculating the density of a sphere

how would u solve a problem if the mass of a plastic ball was given with its density. How can u calculate the volume?
Any help is appreciated. Thank u.
#6
10-18-2010, 03:35 PM
 JohnS Moderator Join Date: Dec 2007 Location: SE Michigan, USA Posts: 9,534 Rep Power: 19
Re: calculating the density of a sphere

Quote:
 Originally Posted by Gagan I actually had a question.... how would u solve a problem if the mass of a plastic ball was given with its density. How can u calculate the volume? Any help is appreciated. Thank u.
Divide the mass by the density

(make sure the mass is measured using the same mass units as are in the numerator of density.)
#7
02-20-2011, 06:45 AM
 Unregistered Guest Posts: n/a
using Stokes method.

I know how to use the equation for finding the density of a sphere.my proble is that my diameter is 0.5mm.so shud I convert to SI units or leave it in mm?because after that I have to work out viscocity.thank you
#8
02-20-2011, 10:44 AM
 JohnS Moderator Join Date: Dec 2007 Location: SE Michigan, USA Posts: 9,534 Rep Power: 19
Re: using Stokes method.

Quote:
 Originally Posted by Unregistered I know how to use the equation for finding the density of a sphere.my proble is that my diameter is 0.5mm.so shud I convert to SI units or leave it in mm?because after that I have to work out viscocity.thank you
Do you know what units are expected for the density? (in the viscosity formula) You can work it out in any units and convert afterward, but it is easier to convert first to the mass units you want in the numerator and the length units you want (cubed) in the denominator.
#9
09-09-2011, 08:19 PM
 Unregistered Guest Posts: n/a
Re: calculating the density of a sphere

what is the mass of a metal ball in kg whose density is 8.96g and diameter is 12.0cm?
#10
04-19-2012, 06:50 AM
 Ginger13 Guest Posts: n/a
Re: calculating the density of a sphere

this is fairly simple to do
say you where calculating the density of the earth first you would have to find the volume of the earth which is 26682593.6
then the formula for denstity which is density=mass ×volume
mass = 5.97×10 to the power of 24
ta -da!!!!!!!!!

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