1. Two clean and parallel glass plates, separated by a gap of 1.625 mm, are dipped in water. If σ = 0.0735 N/m, determine how high the water will rise.
2. A glass tube having an inside diameter of 0.25 mm and an outside diameter of 0.35 mm is inserted into a pool of mercury at 20°C such that the contact angle is 13°8. Determine the upward force on the glass.