as both decrease air density. So the next time you're hurdling through the air at 500 miles per hour, cursing that crying baby, take a moment to appreciate the elegant physics of flight.

Now is the time of the year to do “top for 2010” stuff. I should play this game too. Here are the 2010 Dot Physics Editors picks. (I am the editor) These are in no particular order. Flying R2 ...

Covalent Bonds: Students learn how to predict the shape of a molecule based on the electron dot diagram and to explain what determines molecular polarity. Intermolecular forces are also described.

Electrons tunnel into the dot as the bias across the structure is decreased (Fig. 1a). There is a range of bias in which only one electron can exist in the dot.