Question

a large, 50cm diameter metal cylinder filled with air supports a 20kg piston that can slide up and down without friction. the piston is 100cm above the bottom, when the temperature is 200 celcius An 80kg students then stand on the piston. After several minutes have elapsedby how much has the piston been displaced​

Answer 1

Answer:

Ef = (P1 - P0)A - Mg = 0

(P1 - 101325) (pie 0.25^2) = (20 X 9.8)

=> P1 = 102323 Pa

2f = (P2 - P1) A - (M + M)g = 0

(P2 - 101325) (PIE 0.25^2) = (80 + 20) (5.8)

=> P2 = 106316 Pa

P1V1 = P2V2

=> (102325) (A) (L1) = (106316) (A) (L2)

=> L2 = (102325/106316) (100)

L2 = 96.25 cm

Ans : delta L = L1 - L2 = 3.75 cm