Question

A copper bar of length L and area of cross section A Is placedma
chamber at atmospheric pressure. If the chamber is evacuated, the
percentage change in its volume will be (compressibility of copper
10-12 m2/N and 1 atm = 105 N/m)

Answer 1

Answer:

A copper bar of length L and area of cross section A is placed in a chamber at atmospheric pressure. If the chamber is evacuated, the percentage change in its volume will be (compressibility of copper is 8×10-12m2/N and 1atm=105N/m)

Answer 2

Answer:

B=−V  

ΔV

ΔP

​  

 

Compressibility is given as inverse of Bulk modulus.

Thus, 8×10  

−12

=−  

ΔP

V

ΔV

​  

 

​  

 

or, −  

V

ΔV

​  

=8×10  

−12

×(0−10  

5

)=−8×10  

−7

 

Therefore percentage change would be

−  

V

ΔV

​  

×100=−8×10  

−5