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

force is mass*acceleration.

we have a very small mass: 11.4*0.001 kg

if we want 0.035n of force, we need an acceleration:

0.035 = 11.4*0.001*a

a = 0.035/(11.4*0.001) m/s^2