From: pauld@exploratorium.edu
Date: Thu Sep 05 2002 - 19:24:03 PDT
Message-Id: <200209060224.g862O2t11567@isaac.exploratorium.edu> From: pauld@exploratorium.edu Subject: Re: pinhole A model for snakes movement Date: Thu, 5 Sep 2002 19:24:03 US/Pacific
Alejandra and Pinhole
Modesto came back with great stories of how beautiful Coasta Rica was, how
wonderful the teachers were and how great he was treated as a guest. His stories
of watching glowing volcanic lava flows at night with additional liught from
lightning and lightning bugs were awe inspiring. He is now recruiting us all to
go to Costa Rica to help teach teachers.
regarding snakes:
A wave of transverse motion does travel backward down the body of a snake, the
wave pushes backward on the ground and the ground via newton's law of action and
reaction pushes forward on the snake.
It seems to me a great toy would be an object you could place on the ground which
would propel itself forward by a snake like motion. Anyone know of such a thing?
Paul D
> Hi pinholers!
>
> We just finished a great science teacher conference in Costa
> Rica, where Modesto Tamez was one of the speakers. It was
> very successful. We hope some day in the future, some of you
> decide to participate in our programs and -since you are
> already here- learn a little more about our efforts on
> education and conservation.
>
> As a follow up of the conference, we visited the biggest
> private reserve in the country, the Children's Eternal Rain
> Forest, by the Monteverde League.
>
> We arrived from the Caribbean side to the Pocosol Biological
> Station. "Poco-sol" means "little sun", so you can imagine
> it really rains there all year around.
> http://www.acmonteverde.com/iestaciones2.html
> We had night and day walks with expert naturalists, saw much
> wildlife, learned to "appreciate" biting flies for their
> contribution to the food chain in the rain forest, chased a
> snake for a conference but could not catch it, visited
> fumaroles and the Pocosol lagoon- probably originally a
> volcanic crater- and more. It was a wonderful follow-up to
> the geology summer course too, since there are so many
> volcanoes in the area, active and extinct, as Pocosol is now.
>
> Okay, enough about the experience.
> My question has to do with models for the movement of the
> snake. If I remember right, when we used a suspended slinky
> to show the displacement of a wave, Paul showed that the
> slinky really does two movements: One forward and backward
> and also one of Torque.
>
> So, my idea is that if you add both movements, they could be
> a good model for the movement of the snake.
>
> If you have other ideas about models for snake movement,
> please let me know. Even though biology is one of this
> countries major fields, it is still taught very
> traditionally and I would like to contribute with hands on ideas.
>
> Alejandra
> --
> __ http://www.cientec.or.cr
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