Question

13. A rubber ball is taken to depth 1 km inside water so that its volume reduces by 0.05%. What is the bulk
modulus for rubber?
(1) 2 x 108 N/m2
done
(2) 2 x 10° N/m2
(3) 2 x 1010 N/m2
(4) 2 x 1011 N/m2​

Answer 1

Answer:

Pressure at 1 km depth inside water,

P=1000×10×1000=10

7

Nm

2

say, V=volume of ball

100

0.05

×V = Reduction in volume (i.e) ΔV

Bulk Modulus, β=

ΔV

−PV

=

100

−0.05V

−10

7

×V

=2×10

10

Nm

−2

Hence Option A is correct