Question

two sphere of same size are made of copper and iron respectively . Find the ratio between the masses . density of copper 8900 kg/cubic metre and iron 7800/kg cubic metre

Answer 1

Answer:

Explanation:

=> Here, two sphere of same size are made of copper and iron respectively.

=> According to the question, density of copper is 8900 kg/cubic metre and density of iron is 7800/kg cubic metre thus, the ratio between their masses:

mass of copper m1/mass of iron m2 =  density of copper × volume/ density of iron × volume

but m1 = 8900V

m2 = 7800V

m1/m2= 8900V/7800V

m1/m2 = 89/78

Thus, ratio between the masses of copper and iron is 89 : 78.

Answer 2

Answer:

1.14: 1

Explanation:

Given : Density Copper Dc = 8900 kg/m3

Density of Iron D1 = 7800 kg/m3

Volume of Copper sphere = Volume of Iron sphere

To find : Ratio of Masses of Copper (MC) and Iron (MI)

Solution: Mass = Density x Volume

MC = DC x V, M1 = D1 x V

MC = 8900 V, M1 = 7,800 V

MC = M1

8900 V : 7800 V

= 1.14: 1