PH-2158
Melting, boiling and evaporation
Physics · Secondary 4 · Hard · Melting, boiling and evaporation
A wet shirt is hung outside on two different days. On Day 1 the air is still. On Day 2 there is a strong breeze, but the temperature and humidity are the same on both days. Why does the shirt dry faster on Day 2?
- Moving air removes water vapour near the shirt, so more liquid can evaporate.
- Moving air cools the shirt below 0°C, so the water freezes instead of evaporating.
- Moving air increases air pressure, which stops water molecules returning to the shirt.
- Moving air supplies extra heat, raising the water’s boiling point so it boils away.
Sign in to check your answer and see the hint and the worked explanation. Free on PrepLab High.