06 July 2010

Hooke's masterpiece: Micrographia (National Library of Medicine, National Institutes of Health)

Don't just read someone's description of someone else's description of ...
Read the scientist's actual words!

See excerpts from Hooke's masterpiece MICROGRAPHIA in this clever Virtual book: http://archive.nlm.nih.gov/proj/ttp/flash/hooke/hooke.html

See Hooke's COMPLETE book, Micrografia ,at the gutenberg site: http://www.gutenberg.org/etext/15491

05 July 2010

E = mc^2 explained (from PBS)

Ten top Physicists talk about the meaning of E = mc^2.
Each recording is about 1.5 minutes...  Go to: http://www.pbs.org/wgbh/nova/einstein/experts.html

01 July 2010

NFPA Fire Diamond for Hazardous Chemicals

NFPA Fire Diamond for Hazardous Chemicals.
Blue: Health,
Red: Flammability,
Yellow: Reactivity,
White: Other.

For more info, see: http://www.cooperlab.wustl.edu/LabMethodsReagentsOperations/Lab_Operations/nfpa.html

Check your understanding!
This is the NFPA diamond for Propane (CH3-CH2-CH3).
What does it mean?