Question

A sphere made out of a material that has a density of 2.7 g cm−3 has a mass of 82 g. What is the radius of the sphere?

Answer 1

The radius= 1.08cm = 0.43in

d

e

n

s

i

t

y

=

m

a

s

s

v

o

l

u

m

e

V

o

l

u

m

e

=

m

a

s

s

d

e

n

s

i

t

y

V

o

l

u

m

e

=

82

2.7

=

30.37

c

m

3

The volume of a sphere is given by:

V

=

4

3

π

r

3

So

r

3

=

3

V

4

π

=

3

×

30.37

4

×

3.142

=

1.274

r

=

1.084

c

m

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