- #1

somemonkey

- 1

- 0

## Homework Statement

A 1.25kg wooden block has an iron ball glued to one side. (a) if the blocks floats in water with the iron ball "high and dry," what is the volume of wood that is submerged? (b) If the block is now inverted, so that the iron ball is completely immersed, does the volume of wood that is submerged increase, decrease or remain the same? (c) Calculate the volume of wood that is submerged when the block is in the inverted position.

## Homework Equations

Volume submerged = V of solid (density of solid/density of fluid)

Density of water = 1000

Density of iron = 7860

Density of wood = 1220

## The Attempt at a Solution

So, for part a, I was thinking that since the iron ball isn't submerged, the amount of water is displaces is equal to its weight.

Therefore, the volume of wood that is submerged can be found with (Vsub/Vsolid) = ((density of wood + density of iron ball)/(density of water)), where (Vsub/Vsolid) is the answer.

For part b and c, I was thinking that the volume of wood will decrease, as when the iron ball is submerged, it displaces a volume of water equal to its own volume.

I know that volume of a sphere is V = (4/3)(pi)(r^3), however I don't know exactly how I would plug it into the equation: (Vsub/Vsolid) = ((density of wood + density of iron ball)/(density of water))

thanks in advance