Answer :
Final answer:
In outer space, because there is no gravity to counteract capillary action, the water will not show capillary rise in the tube, resulting in a height of 0 cm. Option A is correct.
Explanation:
In outer space, there is no gravitational force acting on the water to pull it down, which means the water will not rise in the capillary tube due to capillary action. Capillary action is the ability of a liquid to flow in narrow spaces without the assistance of external forces like gravity, and it occurs on Earth because of the balance between adhesive forces (which cause the liquid to climb the sides of the tube) and the weight of the liquid caused by gravity.
Without gravity, the water column would be in a state of weightlessness, and hence, the height of the capillary rise would effectively be 0 cm. As such, the correct answer to the question 'In outer space, what would be the height of capillary rise in this tube?' is (a) 0 cm.
