Regards, Todd Clark, Office of Science U.S. Department of Energy Mike, The "average" is the climatological average, which is an average of the conditions during the past 30 years.

Todd Clark, Office of Science U.S. Department of Energy Matter can be held.

Todd Clark, Office of Science U.S. Department of Energy Mel Let me answer your question by proposing a related question.

Office of Science U.S. Department of Energy 1000 Independence Ave., SW Washington, DC 20585 P: (202) 586-5430 More Information

Regards, Todd Clark, Office of Science U.S. Department of Energy Brett- That is a simple question that leads you to a broad field of science.

Here is another answer in the Newton Archives that also provides some useful information: http://www.newton.dep.anl.gov/askasci/phy00/phy00130.htm Todd Clark, Office of Science U.S. Department of Energy Haythm - Evaporation does not have any sharp beginning point.

Todd Clark, Office of Science U.S. Department of Energy You have confronted one of the fundamental problems in physics that is not confronted in most presentations and/or physics texts.

Regards, Todd Clark, Office of Science U.S. Department of Energy Just guessing: A certain old way of smelting iron makes a big, irregular, crusty chunk of dirty iron.

Regards, Todd Clark, Office of Science U.S. Department of Energy Women and men who work as scientists do all sorts of things.

Todd Clark, Office of Science U.S. Department of Energy Brett, Mossy zinc is a grainy textured zinc formed by pouring melted zinc metal into water.