Question

A piece of iron of mass 156 g and density 7.8 g/3
floats on mercury of density
13.6 g/3
. What is the minimum force required to submerge it?
VOLUME IS NOT 100 CM CUBE

Answer 1

A piece of iron of mass 156 g and density 7.8 g/3

floats on mercury of density

13.6 g/3 .the minimum force required to submerge it is

12 N.

please mark brainliest and follow.

Answer 2

ρ
Hg
​
=13.6×10
3
kg./m
3

Let volume of body=V
Weight of body = buoyant force
ρ
iron
​
Vg=ρ
Hg
​
V
′
g
7.8×10
3
×V=13.6×10
3
×V
′

V
′
=
13.6×10
3

7.8×10
3

​

V
′
=
136
78
​
V
V
′
=0.57V
Volume outside =V−V
′

V−0.57V
=0.43V