Friday

July 25, 2014

July 25, 2014

Posted by **jenna** on Tuesday, October 5, 2010 at 12:44am.

- physics -
**drwls**, Tuesday, October 5, 2010 at 12:54amR = outer radius

r = inner radius (of spherical cavity)

Sphere weight = buoyancy force

(4/3) pi (R^3 - r^3)*(density of Al)*g

= (4/3) pi R^3 * (density of water)*g

(4/3) pi R^3 * (density of water)

= 1.22 kg

(Use the second equation to solve for R)

The (4/3) pi g cancels out in the first equation.

1 - (r/R)^3

= (water density)/(Al density)

Look up the densities and solve

**Related Questions**

PHYSICS!!!! help!!! - A perfectly spherical, but squishable ball of radius 10 cm...

Physics - If the spherical ball is negatively charged.How the mass of the sphere...

Physics - A 1.4 kg ball is thrown upwards off the side of a building with a ...

Math - A hi-tech bowling ball is constructed from concentric spheres, kind of ...

physics - An irregularly shaped chunk of concrete has a hollow spherical cavity ...

physics - A 4.74 kg spherical ball with radius 1.4 cm rolls on a track with a ...

physics - A spherical bowling ball with mass m = 4.1 kg and radius R = 0.116 m ...

physic - Two spherical balls are placed so their centers are 2.6 m apart. The ...

physics please help :) - a.the gravitational force between 2 electrons 1.00m ...

college physics - A small ball of mass m is aligned above a larger ball of mass ...