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Frog in a pod
A from in a hemispherical pod finds that he just floats without sinking in a fluid of density 1.35 g/cm^3. If the from has a mass of 150 g, what is the radius of the pod?
Customer support service by UserEcho
For a hemisphere, the volume is 2/3 * pi * r^3. If the frog-pod combo isn't sinking, then its density must be less than the density of the fluid. Density of an object can be found by mass/volume.
This gives us the equation m/V < D_fluid
Hope this helps!