A capillary-liquid system is placed in an elevator. Which statements are correct if the liquid properties and contact angle are unchanged?
Select all that apply

Question

A capillary-liquid system is placed in an elevator. Which statements are correct if the liquid properties and contact angle are unchanged?

G1 Physics · Accepted Answer

Capillary height is inversely proportional to effective gravity. For upward acceleration, g(eff) = g+a, so the rise decreases. For downward acceleration, g(eff) = g−a, so the rise increases. In ideal free fall, g(eff) = 0, and the usual finite hydrostatic balance used to derive the capillary-rise formula disappears. Therefore all four statements are correct.