Question

What is the mass of a metal sphere of
radius 3.0 cm, if its density is 7.0 g/cm³?
Express your answer in kg too.​

Answer 1

Answer:

792g

Step-by-step explanation:

According to the given question,

r = radius = 3 cm

d = density = 7 g/cm^3

V = volume and m = mass

And we are asked to find the mass of the metal sphere.

We know,

Density = mass/Volume

Mass = Volume×density

m = 4/3 × π × r^3 × d

Putting the values we get,

m = 4/3 × 22/7 × 27 × 7

m = (4×22×27×7)/(3×7)

m = 4×22×9

m = 792 g

Thus mass of the metal sphere is 0.792 kg or 792 g .