Sunday

November 23, 2014

November 23, 2014

Posted by **qay** on Sunday, May 15, 2011 at 4:06am.

- physics -
**Jai**, Sunday, May 15, 2011 at 4:34amrecall that the volume of a sphere (geometry of the ball) is given by

V = (4/3)πr^3

where

r = radius

π = 3.14 (constant)

thus to get radius, we need to first get the volume from the given mass and density.

recall that density is just mass per volume, or

d = m/V

substituting,

8900 = 1/V

V = 0.0001124 m^3

substituting these to volume of sphere,

0.0001124 = (4/3)πr^3

0.0001124 = (4/3)*(3.14)*r^3

r^3 = 0.0001124 / 4.187

r = cuberoot(0.00002684)

r = 0.02994 or approx 0.03 m

hope this helps~ :)

**Answer this Question**

**Related Questions**

physics - A 45.0 g ball of copper has a net charge of 1.5 µC. What fraction of ...

physics - A 45.0 g ball of copper has a net charge of 1.5 µC. What fraction of ...

physics - A 45.0 g ball of copper has a net charge of 1.5 µC. What fraction of ...

physics - A 52.0 g ball of copper has a net charge of 2.1 µC. What fraction of ...

physics - a ball of mass 0.1kg makes an elastic head on collision with a ball of...

Physics - A 2.0 mm diameter copper ball is charged to +42 nC. What fraction of ...

chemistry - Follow the steps provided in the simulation to add water to the ...

College Physics - A positively charged rubber rod is moved close to a neutral ...

Chemistry - Copper has density of 8.94 and crystallizes with the face-centered ...

Physics - 1. A 0.200kg ball moves with a velocity of 0.3m/s. It collides with a ...