"pH is an indication of how many hydrogen ions are present. The lower the pH the higher the hydrogen ion concentration. Hydrogen ion concentration is an indication of acidity. So a low pH is associated with acidity. Conversely a high pH is associated with alkalinity and is an indication of a low concentration of hydrogen ions."
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This guest post is written by Brookhaven physicist Thomas Roser, Chair of the Collider-Accelerator Department. Roser, who earned his Ph.D. from the Swiss Federal Institute of Technology, worked at the University of Michigan before joining Brookhaven in 1991.
Some time back, I wrote about what you need to make a quantum computer.
Physics World has a nice news article about a new experimental development in quantum computing, based on a forthcoming paper from the Wineland group at NIST in Boulder.
One of the many physics stories I haven't had time to blog about recently is the demonstration of relativistic time effects using atomic clocks.