Fair is Foul and Foul is FairThe phrase, fair is foul and foul is fair, is a recurring theme within Shakespeare's play, The Tragedy of Macbeth, which occurs on many levels. This phrase introduces itself within the first act of the play during the first scene. The phrase then dwindles within the ...
Answer: Cloudy water, also known as white water, is caused by air bubbles in the water. It is completely harmless. It usually happens when it is very cold outside because the solubility of air in water increases as water pressure increases and/or water temperature decreases. Cold water holds more air than warm water. In the winter, water travels from the reservoir which is very cold and warms up during its travel to your tap. The air that is present is no longer soluble, and comes out of solution. In addition, once water from our reservoir enters the transmission and distribution pipes, the water is pressurized.
Basically the water vapour from your sweat turns back into liquid water once it touches the glasses, because they're cold enough, and so the water looses the extra energy it needed to maintain its vapour state. The foggy appearance comes actually from the condensed water on the glasses.