Question

The density of iron is 7.8 g/cc. how much would 10 cc of iron weigh?

Answer 1

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11th

Physics

Mechanical Properties of Fluids

Variation of Pressure With Depth

A piece of iron has density...

PHYSICS

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Asked on December 27, 2019 by

Anshi Neesa

A piece of iron has density 7.8/cm

3

& volume 10

−4

m

3

. It is totally immersed in the water calculate weight of iron in water

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ANSWER

Given that,

Volume of body V=10

−4

m

3

Density of iron, ρ

i

=7800kgm

−3

Density of water ρ

w

=1000kgm

−3

Weight in air,W

a

=ρ

i

Vg=7800×10

−4

×10=7.8N

We know that,

Weight in water = weight in air – buoyancy force

W

w

=W

a

−ρ

w

Vg

W

w

=7.8−1000×10

−4

×10

W

w

=6.8N

Hence, the weight of body in water is 6.8 N