June 7, 2022
IBDP Physics / Topic 3 Thermal Physics
This question is about the rise of water in a capillary tube.
A capillary tube is a tube that is open at both ends and has a very narrow bore. A capillary
tube is supported vertically with one end immersed in water. Water rises up the tube due to
a phenomenon called capillary action. The water in the bore of the tube forms a column of
height h as shown below.
(a) The height h, for a particular capillary tube was measured for different temperatures of
the water. The variation with temperature of the height h is shown below. Uncertainties
in the measurements are not shown.
Answers / Marking Scheme:
(i) sensible line of fit with reasonable distribution of points either side of line;
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