??

0.01 moles of an ideal diatomic gas is enclosed in an adiabatic cylinder of cross-sectional area A = 10 –4 m2. In the arrangement shown, a block of mass M = 0.8 kg is placed on a horizontal support, and another block of mass m = 1 kg is suspended from a spring of stiffness constant k = 16 N/m. Initially, the spring is relaxed and the volume of the gas is V = 1.4 X 10 –4 m 3 . Take atmospheric pressure Po = 10 5 Pa and g = 10 m/s2.

15. The initial pressure of the gas is
(a) 4 X 10 5 Pa
(b) 2 X 10 5 Pa
(c) 2 X 10 9 Pa
(d) None of these

16. If block m is gently pushed down and released it oscillates harmonically, its angular frequency is
(a) 12 rad/s
(b) 8 rad/s
(c) 6 rad/s
(d) None of these
m
M
k