Urban Legends and Folklore

Recent Answers

2011-12-05 Popular Science - steam on mirror:

Hi Gail,  Water vapor in the air measures from a trace, to up to about 4% maximum, see  http://www.theweatherprediction.com/habyhints/40/    Your hygrometer measures specific humidity, not relative humidity

2011-12-05 Popular Science - steam on mirror:

Hi Gail,  There is no pressure/temperature change involved like we see with cloud formation outside.  As stated earlier, that's really not steam on the bathroom mirror, but rather condensed (liquid droplets)

2011-12-03 Popular Science - H20 splitted up?:

Hi Karen,  The water molecule can also be written HOH which is actually more accurate, so the actual chemical equation is  2 molecules of HOH yields 2 hydrogen diatomic molecules and 1 Oxygen diatomic