qn: "my gal asked if evaporation will be faster with wind. I answered "Yes" but am stuck when we have to explain why?"
ans: When water evaporates, the water molecules are released into the air. Water molecules can also go back from the air into the water.
When humidity is at 100%, the rate at which water molecules move into the air is equal to the rate at which water molecules move back from the air.
Wind will sweep away the humid air and reduce the humidity of the air above the water, resulting in an increase in evaporation.
However, if the blowing air is already saturated with water, then the rate of evaporation will not increase.