7. The compressibility of water is  4×10^-5  per unit atmospheric pressure. The decrease in volume of 100 cubic centimeter of water under a pressure of 100 atmosphere will be

(a) 0.4 cc                                         (b) 4×10^-5 cc

(c)  0.025 cc                                    (d)  0.004 cc

Answer-a

(5)