2006-09-12 10:33:38 · 9 answers · asked by vitchunsas_hot 1 in Science & Mathematics ➔ Physics
Assuming you can't weigh it.
First you must have the density of the material the sphere is made of. The density can be represented by P.
You need the Volume formual as well
V=4/3*(pi)*r^3
Since mass=volumeXdensity
Mass=P*4/3*(pi)*r^3
2006-09-12 10:41:38 · answer #1 · answered by Scott S 4 · 0⤊ 0⤋
I can add another method for determining the volume of the sphere. Place the sphere in a liquid of lesser density than the sphere. Measure the volume of liquid displaced. Use the given formulas to calculate the mass. Mass = density * volume.
Or you could just weigh it.
2006-09-12 10:57:24 · answer #2 · answered by Jack 7 · 0⤊ 0⤋
How big is the sphere?
If you know its density, use mass = density * volume.
You can find the volume using V = 4/3 * pi * r^3, or submerge it in water and measure the volume of the displaced water.
If it is very large, for example, a planet, or very small, for example an atom, you need to calculate the mass with respect to its forces and motion.
For a planet you measure the centripetal acceleration of an orbiting body and use GM/R^2 = a to calculate the mass of the planet.
For an atom or sub-atomic particle (assuming these are spherical), find the mass of a known number of them - mass of the particle = total mass / number of particles.
2006-09-12 11:07:01 · answer #3 · answered by Anonymous · 0⤊ 0⤋
The volume of a sphere is 4/3* pi * r^3. (r=radius)
The mass would depend on what it's made of.
2006-09-12 10:38:25 · answer #4 · answered by banjuja58 4 · 0⤊ 0⤋
Put it on a scale.
In terms of math, find the volume of it:
4/3*pi*r^3
and multiply by the density.
2006-09-12 10:37:11 · answer #5 · answered by Jenelle 3 · 0⤊ 0⤋
m = rho * 4/3 * pi * R3
where R is the radius and rho the density.
2006-09-12 11:16:17 · answer #6 · answered by dutch_prof 4 · 0⤊ 0⤋
Its mass is the product of its density and its volume.
Of course, you could just weigh it.
2006-09-12 10:36:07 · answer #7 · answered by DidacticRogue 5 · 0⤊ 0⤋
You can measure it with an analytical balance
2006-09-12 10:36:37 · answer #8 · answered by Anonymous · 0⤊ 0⤋
find the diameter,what's the diameter,what do you want?cubic feet?
2006-09-12 10:35:32 · answer #9 · answered by aries4272 4 · 0⤊ 1⤋