Physics · May / June 2025 · Paper 11 · Question 17

A sample of water in a beaker is at a temperature T. The surface area of the water is A and an electric fan blows air across the top of the beaker at a speed v. For which values of T, A and v does the water evaporate the most rapidly?

1. AT = 18 °C, A = 45 cm², v = 0.1 m/s
2. BT = 24 °C, A = 50 cm², v = 1.9 m/s
3. CT = 38 °C, A = 70 cm², v = 5.0 m/s
4. DT = 38 °C, A = 45 cm², v = 4.7 m/s

As printed in the paper