Water rises in a capillary as shown. Choose the correct graph of pressure p versus height y above point O along the capillary axis. Image
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Question

Water rises in a capillary as shown. Choose the correct graph of pressure p versus height y above point O along the capillary axis. Image

G1 Physics · Accepted Answer

Step 1: Use surface-energy/pressure relations: ΔP = 2T/R for a liquid drop or 4T/R for a soap bubble, capillary rise h = 2T cosθ/(ρgr), and surface energy = TΔA. Step 2: Apply force or energy balance to the stated radii and surface areas. Applying these relations to the given data gives A: Image 1. Final answer: A.