A cylinder is filled with 0.10 mol of an ideal gas at standard temperature and p
ID: 1705213 • Letter: A
Question
A cylinder is filled with 0.10 mol of an ideal gas at standard temperature and pressure, and a 1.4-kg piston seals the gas in the cylinder (see figure) with a frictionless seal. The trapped column of gas is 2.1-m high. The piston and cylinder are surrounded by air, also at standard temperature and pressure. The piston is released from rest and starts to fall. The motion of the piston ceases after the oscillations stop with the piston and the trapped air in thermal equilibrium with the surrounding air.
A cylinder is filled with 0.10 mol of an ideal gas at standard temperature and pressure, and a 1.4-kg piston seals the gas in the cylinder (see figure) with a frictionless seal. The trapped column of gas is 2.1-m high. The piston and cylinder are surrounded by air, also at standard temperature and pressure. The piston is released from rest and starts to fall. The motion of the piston ceases after the oscillations stop with the piston and the trapped air in thermal equilibrium with the surrounding air. (a) Find the height of the gas column. m (b) Suppose that the piston is pushed down below its equilibrium position by a small amount and then released. Assuming that the temperature of the gas remains constant, find the frequency of vibration of the piston. HzExplanation / Answer
a) temperature remains the same. so PV=const. P'=P0+mg/S where m is the mass of the cylinder = 1.4kg. S be area of the cylinder. -------- at first, we have. PV=nRT. so V=nRT/P=S*h so S=nRT/(Ph)=1.187e-3(m2). from this we have P'=10^5+1.4*9.8/S=1.116e5(Pa). ----- P*V=const so P*h=const. h'=P*h/P'=1.9(m). ------ b) T = const. so we have P*h=const. so P*S*h=const. so F*h=const. so dF*h+dh*F=0 dF/dh=-F/h'=-P'*S/h'=-70.5. the angular frequency. w=sqrt(k/m)=sqrt(-dF/dh*m)=7.1(rad/s) so f=w/2pi=1.13(hz)
Related Questions
drjack9650@gmail.com
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.