Question

what will be the density of a sphere that has a radius of 3cm and mass of 100g ?​

Answer 1

Answer:

Density is given as mass / volume.

Mass is the sphere is 100 g.

Volume of the sphere =  (pi∗r3)∗4/3  

=(4∗22∗3∗3∗3)/(7∗3)cm3  

=792/7 cm 3  

Therefore, Density is  100/(792/7)g/cm3  

Which gives: density = 0.883838  g/cm3  

If you want to change the units to kg per cubic metres, then we need to divide this value by 1000( for g to kg) and multiply by 100 * 100 * 100 (for cm to m).

This makes the density to be 883.83  kg/m3