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2012-02-11 Physics - Physics:

Applying Newton's 2nd Law there is an upward force caused by the tension in the rope Ft and a downward gravitational force Fg. Since the elevator is accelerating upward the sum of the forces in the upward

2012-02-10 Entomology (Study of Bugs) - orthopteran commensal w termites?:

Dear Joan - You indeed appear to have stumbled upon a mystery. Your specimen very well could be in the family Gryllacridae - see http://tinyurl.com/7qu97fe for a specimen from St. Lucia that appears quite

2012-02-10 Chemistry (including Biochemistry) - Electrophoresis:

Hello Nathaniel!    Gel electrophoresis is one of the last steps of the forensic DNA test. This technology has been around a long time and is considered very reliable.    What is considered less reliable

2012-02-10 Geology - Tight gas/shale gas:

Sikander,    I have yet to see the study about tight gas. However, apart from the interpretation you mentioned, subsurface extent of the formation is also delineated to estimate the possible reserves.

2012-02-10 Chemistry (including Biochemistry) - Biochemistry:

Hi Malory!    You need the Henderson-Hasselbach equation to do that.    Try these links.    http://en.wikipedia.org/wiki/Henderson%E2%80%93Hasselbalch_equation    http://chemistry.about.com/od/acidsbase1/a/hendersonhasselbalch