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A 20cm long capillary tube is dipped in water. The water rises up to 8cm. If the entire arrangement is put in a freely falling elevator the length of the water column in the capillary tube will be ___________

A 20cm long capillary tube is dipped in water. The water rises up to 8cm. If the entire arrangement is put in a freely falling elevator the length of the water column in the capillary tube will be ___________ Correct Answer 20cm

In the freely falling elevator, the entire arrangement is in a state of weightlessness, g = 0. So, water will rise (h = 2σcosθ/rρg ) to fill the entire 20cm length of the tube.

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