stone is 90g, water is 50 centimeter cube and water and pebble is 84 centimeter cube, what is the density of stone?

2.65g/cm³

Explanation:

Given parameters:

Mass of stone  = 90g

Volume of water = 50cm³

Volume of water and pebble  = 84cm³

Unknown:

Density of stone = ?

Solution:

Density is the mass per volume of a substance;

        Density =

To find the density of the stone, we know the mass of the stone already. Then let us find the volume of the stone;

 Volume of stone  = Volume of water and Pebble - Volume of water

                               =   84cm³ - 50cm³

                               = 34cm³

So, density of stone  =  = 2.65g/cm³

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.