Question

radius of iron is sphere is 0.21 CM if density of iron is 7.80 g/cc calculate in mass

Answer 1

Hey!

____________________

Radius of iron sphere = 0.21 cm
Volume of iron sphere = 4/3 πr^3
Volume = 0.0388 cm^3

Density of iron sphere = 7.8 g/cm^3
Mass =?

We know,

Density = Mass/Volume
7.8 = Mass/0.0388
Mass= 3.02 g/cm^3 [Approx.]

____________________

Hope it helps...!!!

Answer 2

Volume of sphere is 4/3πr^3.

___________

_____________
Radius is 0.21cm
______________
_____________
4/3×22/7×(0.21)^3
4/3×22/7×.0092
=0.038
Then density = mass of object/ volume of object
___________
___________
7.8=mass/0.38
Mass= 7.8×0.038
Mass=0.234
answer .......