Topic: Fluid Mechanics
A glass tube of 8 mm diameter is immersed in water. Surface tension of water is 0.0075 kg m and rise of water in the tube due to capillary effect is
- A. 7.5 mm
- B. 3.75 mm
- C. 11.25 mm
- D. None of these
Answer: B. 3.75 mm
Explanation: Rise of water in the tube due to capillary effect h = (4 * sigma * cos(theta)) / (rho * g * d). For water in glass tube theta = 0, cos(0) = 1. h = (4 * 0.0075 * 1) / (1000 * 0.008) = 0.00375 m = 3.75 mm.