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- Newsgroups: sci.physics
- Path: sparky!uunet!uunet.ca!wildcan!sq!msb
- From: msb@sq.sq.com (Mark Brader)
- Subject: Re: BAROMETERS (was Re: Subject?)
- Message-ID: <1992Sep3.231348.8976@sq.sq.com>
- Summary: I've just invented a new solution, but this Summary line is too narrow
- Organization: SoftQuad Inc., Toronto, Canada
- References: <1992Sep2.172157.14850@linus.mitre.org> <10569@sun13.scri.fsu.edu>
- Distribution: na
- Date: Thu, 3 Sep 92 23:13:48 GMT
- Lines: 37
-
- > In addition, the graduations on the face of the barometer can be used
- > to assist in making angle measurements, since those in one quadrant
- > can be mapped onto 90 degrees.
-
- Ah, he assumes it's an analog barometer. For balance, let's assume it
- isn't. Now place a board on the ground and cover it with closely spaced
- dead-end wires, which are alternately connected to two terminals, like this:
-
- +-----------------------------------------------------
- | -----------------------------------------------------+
- +----------------------------------------------------- |
- | -----------------------------------------------------+
- +----------------------------------------------------- |
- | -----------------------------------------------------+
- +----------------------------------------------------- |
- | -----------------------------------------------------+
- <----+----------------------------------------------------- |
- -----------------------------------------------------+--->
-
- Set up a timer circuit so that anything making an electrical connection
- between the terminals will stop the timer. Go to the roof and there set
- up a pair of contacts a small distance apart, so that anything making an
- electrical connection between them will start the timer. [The connection
- between the ground and rooftop circuits had better be through a radio
- link, since you don't know the height of the building. :-)]
-
- On the roof, break the barometer open and catch the mercury. Pour it
- between the rooftop contacts so that it lands on the ground contacts.
- Correct for atmospheric resistance and compute the height.
-
- Best performed on a calm day!
- --
- Mark Brader "Great things are not done by those
- SoftQuad Inc., Toronto who sit down and count the cost
- utzoo!sq!msb, msb@sq.com of every thought and act." -- Daniel Gooch
-
- This article is in the public domain.
-