Question

the density of iron is 7.8 g/cm³and of zinc is 7.15 g/cm³.for the same mass the volume of which a. zinc is more than iron b.iron is more than sinc c.both iron and zinc is same d.nothing can be said which option is right​

Answer 1

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

Answer 2

Answer:

Option b is the ans

Explanation:

I hope you get this