A glass capillary tube sealed at both ends is 100 cm long
PHYSICS · Subjective · A Level · Physics · Further mechanics and thermal physics · Further mechanics and thermal physics
Problem
A glass capillary tube sealed at both ends is 100 cm long. It lies horizontally with the middle 10 cm containing Hg. The two ends of the tube which are equal in length contain air at 27∘C and pressure of 76 cm of Hg. The tube is kept in a horizontal position such that the air column at one end is at 0∘C, the other end is maintained at 127∘C. Calculate the length of the air column and its pressure which is at 0∘C. Neglect the change in volume of Hg and glass.