Question

Why do clothes dry faster on windy days?
A) Evaporation increases with increase in wind speed.
B) Evaporation increases with increase in humidity.
C) Evaporation decreases with increase in wind speed.
D) The above statement is incorrect.

Answer 1

Hint: We know that the Windy day refers to process Evaporation and Rate of Evaporation increases with wind speed. Similarly in summer it is usually dryer as well as water will evaporate from the cloth being faster when the humidity is low. If there is wind then evaporated water is also carried away making more evaporation. A good wind in winter will speed drying even if humidity is higher.

Complete step-by-step answer:
i) Evaporation increases with increase in wind speed. With the increase in wind speed, the particles of water vapour move away with the wind, decreasing the amount of water vapour in the surrounding.
ii) Clothes dry faster on a windy day. Wet clothes dry faster on windy days as it becomes easier for the water from the clothes to evaporate into the atmosphere.
iii) The strong winds help in the evaporation of water from the clothes.
iv) On humid days, there is already enough water vapour in the air and hence the rate of evaporation is slowed and wet clothes dry slower.
v) When temperature and wind speed are constant, but humidity increases, the rate of evaporation will decrease.

So, the correct answer is Option (A) Evaporation increases with increase in wind speed.

Note: Evaporation increases with the increase in wind speed. Vapour particles move away when the speed of wind increases. This leads to an increase in the amount of water vapour in the atmosphere. When wind speed and humidity stay constant, and temperature increases, then the rate of evaporation will increase because warmer air can hold more water vapor than colder air all of these variables work together so this experiment is really quite complex.