Question

Determine the compressibility of an incompressible fluid, if the pressure of the fluid is changed from 70 N/m^2 to 130 N/m^2. The volume of the liquid changes by 0.15 percent.

(a) 0.0025 m^2/N

(b) 0.0050 m^2/N

(c) 0.0070 m^2/N

(d) 0.0012 m^2/N

I got this question in semester exam.

The question is from Thermodynamic Properties & Compressibility in portion Properties of Fluids of Fluid Mechanics

Answer 1

Right choice is (a) 0.0025 m^2/N

To explain I would say: Compressibility=1/Bulk Modulus

                                           =1/K

                                   K=(dp*V/dv)

                                     =60/0.15

                                     =400

                     Compressibility=.0025.