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peteuplink:

Proof Without Words: The Circle (by minutephysics)

Prove πR² using only beads and a ruler!

I first saw this proof in an article by Russell Jay Hendel, Dowling College: http://bit.ly/LQlwQw

minutephysics is now on Google+ - http://bit.ly/qzEwc6
And facebook - http://facebook.com/minutephysics
And twitter - @minutephysics

Minute Physics provides an energetic and entertaining view of old and new problems in physics — all in a minute!

Music by Nathaniel Schroeder

Thanks to Nima Doroud for contributions and to Perimeter Institute for support.
http://www.perimeterinstitute.ca

Reblogged 2 days ago from peteuplink 16 notes
life: vaderetroearthgirl: From The Mind, a LIFE Science Library Book, by John Rowan Wilson and the Editors of TIME-LIFE Books. (1964, reprinted in 1971) I would have been obsessed with this book if I’d had it as a child. “Routes for Musical Messages The picture on the opposite page is a photograph of a pianist. On it have been sketched the two hemispheres of the brain, a network of nerves throughout the arms, and a connecting length of spinal cord. The system of billions of cells and miles of fibers can relay many messages at once…” Just another Wednesday, informing our Tumblr followers about science. life: vaderetroearthgirl: From The Mind, a LIFE Science Library Book, by John Rowan Wilson and the Editors of TIME-LIFE Books. (1964, reprinted in 1971) I would have been obsessed with this book if I’d had it as a child. “Routes for Musical Messages The picture on the opposite page is a photograph of a pianist. On it have been sketched the two hemispheres of the brain, a network of nerves throughout the arms, and a connecting length of spinal cord. The system of billions of cells and miles of fibers can relay many messages at once…” Just another Wednesday, informing our Tumblr followers about science.

life:

vaderetroearthgirl:

From The Mind, a LIFE Science Library Book, by John Rowan Wilson and the Editors of TIME-LIFE Books. (1964, reprinted in 1971)

I would have been obsessed with this book if I’d had it as a child.

“Routes for Musical Messages

The picture on the opposite page is a photograph of a pianist. On it have been sketched the two hemispheres of the brain, a network of nerves throughout the arms, and a connecting length of spinal cord. The system of billions of cells and miles of fibers can relay many messages at once…”

Just another Wednesday, informing our Tumblr followers about science.

Reblogged 3 days ago from freshphotons (Originally from vaderetroearthgirl) 1,089 notes