The density of ice is 917.what fraction of the volume of a piece of ice will be above the liquid when floating in fresh water

of that piece of ice would be above the freshwater.  Assumptions:

Explanation:

The volume of that chunk of ice can be split into two halves: volume above water , and volume under water . The mass of the whole chunk of ice would be:

.

Let be the acceleration due to gravity. The gravity on the entire chunk of ice would be

.

On the other hand, the size of buoyant force on an object is equal to the weight of the liquid that it displaces. That is: .

Recall that is the volume of the ice above the water, and is the volume of the ice under the water.

The mass of water displaced would be equal to:

.

The weight of that much water would be

.

Apply the equation . The bouyant force on this chunk of ice would be equal to .

Since the ice is floating, the forces on it need to be balanced. In other words, .

On the other hand, recall that

.

Combine the two halves to obtain:

.

.

Divide both sides by (assume that ) to obtain:

.

Rearrange to obtain:

.

However, the question is asking for , the fraction of the volume above water. Note that

.

Therefore,

.

That's equivalent to .

what experimental evidence led scientists to change from the previous model to this one?

a few of the positive particles aimed at a gold foil seemed to bounce back.

the colors of light emitted from heated atoms had very specific energies.

experiments with water vapor showed that elements combine in specific proportions.

cathode rays were bent in the same way whenever a magnet was brought near them.