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Last modified: 2024-05-18

21. astronomy activities (score: 182)

Author: bernard cleyet <bernard@cleyet.org>

Date: Wed, 29 May 2019 12:02:12 -0700

Another detailed instruction of high quality pendulum in here: https://www.amazon.com/Scientific-Americans-Amateur-Scientist-Science/dp/0970347626 bc visited the Panthéon where Léon second denonstrat

/archives/2019/5_2019/msg00028.html (5,994 bytes)

22. astronomy activities (score: 170)

Author: "Strickert, Rick" <rstrickert@signaturescience.com>

Date: Wed, 29 May 2019 15:48:00 +0000

How about building and demonstrating a Foucault pendulum to show the effect of Earth's rotation on its axis? Here are some links about making a Foucault pendulum: "School Foucault pendulum" (https://

/archives/2019/5_2019/msg00027.html (7,652 bytes)

23. Electrical Pendulum Drive (was Re: moon's synchronism) (score: 146)

Author: brian whatcott <inet@intellisys.net>

Date: Fri, 20 Mar 1998 18:45:44 -0600

At 11:51 3/20/98 EST, you wrote: ... any pendulum analogy would be like driving a steel pendulum bob on a long string whose natural period is 3 seconds at 60 Hz about its equilibrium orientation with

/archives/1998/03_1998/msg00484.html (5,030 bytes)

24. pendulum ideas (score: 140)

Author: danmacisaac@gmail.com

Date: Tue, 31 Aug 2021 06:09:36 -0400

Thats about 1/3 of the modeling physics semester start pendulum activity. Another big chunk is discourse, and then linearization of data. That really should be written up and published, I guess. I ne

/archives/2021/8_2021/msg00022.html (7,174 bytes)

25. [**External**] pendulum ideas (score: 140)

Author: Philip Keller <pkeller@holmdelschools.org>

Date: Tue, 31 Aug 2021 07:41:28 -0400

I'll offer two: 1. Starting with a meter stick pendulum, experimentally determine where to attach a small mass without changing the period. This leads into discussions of the sweet spot (center of pe

/archives/2021/8_2021/msg00023.html (6,537 bytes)

26. pendulum ideas (score: 133)

Author: Anthony Lapinski <alapinski@pds.org>

Date: Mon, 30 Aug 2021 23:00:58 -0400

I teach high school physics and have done the typical pendulum lab where kids vary the mass, length, and swing angle. They can plot period vs length and determine the length of a pendulum with a peri

/archives/2021/8_2021/msg00017.html (5,926 bytes)

27. pendulum ideas (score: 133)

Author: Joseph Bellina <inquirybellina@comcast.net>

Date: Mon, 30 Aug 2021 23:38:16 -0400

How about before you develop any theory you simply ask them to determine what variables affect the period and design experiments to support their claims. Most will think mass is important and find ot

/archives/2021/8_2021/msg00018.html (6,780 bytes)

28. pendulum ideas (score: 133)

Author: Brian Whatcott <betwys1@sbcglobal.net>

Date: Tue, 31 Aug 2021 04:12:35 +0000 (UTC)

a twenty dollar GPS module can provide the exquisitely accurate pulse to a current amp and an axi-symmetrical pot inductor which can keep it sweeping for 24 hours if a magnet is imbedded in the bob.

/archives/2021/8_2021/msg00019.html (7,040 bytes)

29. Electrical Pendulum Drive (was Re: moon's synchronism) (score: 127)

Author: "Bob Sciamanda" <trebor@velocity.net>

Date: Fri, 20 Mar 1998 22:44:47 -0500

--Original Message-- From: brian whatcott <inet@intellisys.net> To: phys-l@atlantis.uwf.edu <phys-l@atlantis.uwf.edu> Date: Friday, March 20, 1998 8:01 PM Subject: Electrical Pendulum Drive (was Re:

/archives/1998/03_1998/msg00491.html (4,787 bytes)

30. Pendulum (score: 115)

Author: bennett@Oakland.edu (Clarence Bennett)

Date: Thu, 30 Jan 1997 11:35:42 -0600

At the recent AAPT meeting in Phoenix, when I went up to the top floor of the hotel to look at the annular restaurant, it occurred to me that one ought to have a portable Foucault Pendulum to set on

/archives/1997/01_1997/msg00266.html (3,460 bytes)

31. Pendulum (score: 115)

Author: "Van E. Neie" <ven@physics.purdue.edu>

Date: Thu, 30 Jan 1997 11:40:31 -0500 (EST)

At the recent AAPT meeting in Phoenix, when I went up to the top floor of the hotel to look at the annular restaurant, it occurred to me that one ought to have a portable Foucault Pendulum to set on

/archives/1997/01_1997/msg00270.html (4,029 bytes)

32. curvature of buckets of water (score: 60)

Author: Robert A Cohen <bbq@ESU.EDU>

Date: Mon, 5 Jul 1999 15:22:42 -0400

My comments are interspersed below... On Mon, 5 Jul 1999, Gary Karshner wrote: I have a question about "absolute rotation." If one placed the bucket of water in the center of the rotating platform, o

/archives/1999/07_1999/msg00099.html (7,824 bytes)

33. Galileo was wrong (score: 48)

Author: "LaMontagne, Bob" <RLAMONT@providence.edu>

Date: Tue, 21 Sep 2010 17:48:03 -0400

Really fast :-) Like once a day. Actually, a lot of Galileo's "proofs" we kind of short-circuited because there was a third contemporary system in use for producing navigational tables that was a hyb

/archives/2010/9_2010/msg00250.html (18,598 bytes)

34. Galileo was wrong (score: 48)

Author: Dennis Erickson <derickson.21stcentury@rcn.com>

Date: Tue, 21 Sep 2010 19:14:33 -0500

Tycho's? On Sep 21, 2010, at 4:48 PM, LaMontagne, Bob wrote: Really fast :-) Like once a day. Actually, a lot of Galileo's "proofs" we kind of short-circuited because there was a third contemporary s

/archives/2010/9_2010/msg00253.html (19,137 bytes)

35. Galileo was wrong (score: 48)

Author: Joseph Bellina <inquirybellina@comcast.net>

Date: Tue, 21 Sep 2010 21:19:16 -0400

The Tychonic model, that is the one you are referring to had another problem. If the planets were still moving around on crystal sphere, they would run into each other. Joseph J. Bellina, Jr. Ph.D. E

/archives/2010/9_2010/msg00257.html (19,401 bytes)

36. Galileo was wrong (score: 48)

Author: Bill Nettles <bnettles@uu.edu>

Date: Wed, 22 Sep 2010 10:28:37 -0500

Malcolm Longair has an interesting take on the whole story (Ptolemy to Tycho to Kepler to Galileo) in his "Theoretical Concepts in Physics." Galileo and Kepler were contemporaries with Kepler outside

/archives/2010/9_2010/msg00263.html (20,803 bytes)

37. Galileo was wrong (score: 48)

Author: Joseph Bellina <inquirybellina@comcast.net>

Date: Wed, 22 Sep 2010 11:50:43 -0400

I find it hard to think of Galileo as being outside the influence of the Catholic Church. He seems like a pretty go insider to me. He needed some sort of circular inertia to explain the continue moti

/archives/2010/9_2010/msg00264.html (22,384 bytes)

38. techshop opportunity (score: 38)

Author: brian whatcott <betwys1@sbcglobal.net>

Date: Mon, 03 Jan 2011 18:39:00 -0600

On 1/3/2011 3:36 PM, Stefan Jeglinski wrote: A long period pendulum clock, w/electromagnetic escapement. Here's a short period one: http://www.bmumford.com/clocks/em2/index.html Interesting. I used t

/archives/2011/1_2011/msg00041.html (6,945 bytes)

39. Galileo was wrong (score: 38)

Author: brian whatcott <betwys1@sbcglobal.net>

Date: Tue, 21 Sep 2010 18:37:32 -0500

The gyroscope, of which the pendulum is a special case, has this peculiar property: fixity in space. Mach had some ideas about inertia and the collective mass of the universe, but I think the usual v

/archives/2010/9_2010/msg00252.html (13,560 bytes)

40. Galileo was wrong (score: 38)

Author: Joseph Bellina <inquirybellina@comcast.net>

Date: Tue, 21 Sep 2010 21:16:47 -0400

Yep, as I recall that may have been Mach's arguement, that all those stars going round could make the pendulum go around, but I may have it wrong. joe Joseph J. Bellina, Jr. Ph.D. Emeritus Professor

/archives/2010/9_2010/msg00255.html (13,610 bytes)

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