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Rain Static ?
Jimmie D wrote:
From my perpective it does seem to track humidity or rather the lack of humidity. IS this not correct? Of course that's correct. Take a look at table 2 in the following ESDA web page where there is up to a 60 to one difference in static levels between 25% max RH and 65% min RH: They also say, "Virtually all materials, including water and dirt particles in the air, can be triboelectrically charged." http://www.esda.org/basics/part1.cfm -- 73, Cecil http://www.w5dxp.com |
Rain Static ?
Denny wrote:
There is science and technology yet to come that will find distance, forces and energy in the universe that is likely to turn the BBT onto its ear... So, for the moment I remain a thoughtful agnostic RE the BBT... Scientists once said space is not empty. Then some other scientists "proved" that space is empty. Now some latter day scientists have pretty much proved that "empty" space is not empty. It is possible that ordinary black holes eventually explode forming mini-universes (like ours?) So maybe it was just a Relatively Medium Bang instead? Would you believe an RMBT? :-) These multiple bubble universes may sometimes collide and indeed there seems to be a section of our universe where the light is blue shifted. -- 73, Cecil http://www.w5dxp.com |
Rain Static ?
Richard Clark wrote:
On Wed, 13 Dec 2006 23:56:54 GMT, "Tom Donaly" wrote: "Detecting the Earth's Electricity" by Shawn Carlson, Scientific American, July 1999. "Getting a Charge Out of Rain" by Shawn Carlson Scientific American, August 1997 Excellant sources, Tom. 73's Richard Clark, KB7QHC Thanks, Richard. 73, Tom Donaly, KA6RUH |
Rain Static ?
On 14 Dec 2006 04:51:37 -0800, "Denny" wrote:
Creationist? Me? Hi Denny, The substance of your posting (consistent on this side topic throughout) paints one from event-horizon-to-event-horizon. Examine it and note there isn't any discussion of theory, merely the hint of an alternative's outcome - a Creationist hallmark. 73's Richard Clark, KB7QHC |
Rain Static ?
On Thu, 14 Dec 2006 05:29:15 -0500, "Jimmie D"
wrote: The question to me is not whether or not that the phenomenon exist but that it does seem to behave differently at different places at least per the different reports I have heard here and my own personal experience. Hi Jimmie, The difference is, if you have the instruments suggested in these articles offered by Tom, then you have a basis for making determinations. Anything else is the subjectivity of stamp collecting. In some places it is quite common and in other places people are totally unfamilar with it. The latter would have been my case if I had never moved from South Ga. From my perpective it does seem to track humidity or rather the lack of humidity. IS this not correct? Humidity is a correlative, certainly. Temperature and water content are strongly linked, but most of us are only aware of RELATIVE not absolute humidity. Hint: using the right instrument can make a huge difference in this issue of Rain Static. 73's Richard Clark, KB7QHC |
Rain Static ?
For those interested in more than just what springs fully formed from Cecil's mouth: "Detecting the Earth's Electricity" by Shawn Carlson, Scientific American, July 1999. "Getting a Charge Out of Rain" by Shawn Carlson Scientific American, August 1997 Read the articles, build the equipment, use it, and decide for yourself what's going on. 73, Tom Donaly, KA6RUH I want to thank Tom Donaly for mentioning these articles. I worked very hard of them back when I used to write for Scientific American and I still think these are great resources. "Getting a Charge Out of Rain" is actually my favorite of the projects, and it's one I invite everyone to try. The apparatus described in the article allows one to measure the electric charge on individual drops of rain as they fall in a summer storm. The instrument set a new standard for measuring charges on droplets because the device is intrinsically calibrated. The calibration is achieved by using a precision capacitor. Since the value of the capacitance is precisely known, the charge on the falling drop can be determined by simple geometry and the size of the voltage pulse generated as it falls through the detector. As I understand it, some folks who do these kinds of measurements professionally redesigned their detectors to take advantage of the technique that this article introduced. If you can't find a copy of these articles in your local library, they are available on The Amateur Scientist 3.0 CD-ROM, which is my personal archive of all the articles that ever appeared in The Amateur Scientist department of Scientific American going back to the beginning in 1927. (Over 1000 projects.) You can find it either on Amazon or on my own web site at http://www.brightscience.com |
Rain Static ?
Richard Clark wrote:
On 13 Dec 2006 09:31:00 -0800, "Denny" wrote: As a scientific explanation the BBT resembles The House that Topsy Built, only more rickety... Hi Denny, Your objection (emblematic of the unquoted ones) has all the hallmarks of Creationist Science. No one can live in that "House" because it is rickety. So live in the street instead? Fine if your neighborhood is the Garden of Eden, but it rains here, and this old house, as rickety as it is - still has a tight roof. 73's Richard Clark, KB7QHC On this Richard, we agree completely. tom K0TAR |
Rain Static ?
On 14 Dec 2006 14:48:36 -0800, wrote:
For those interested in more than just what springs fully formed from Cecil's mouth: "Detecting the Earth's Electricity" by Shawn Carlson, Scientific American, July 1999. "Getting a Charge Out of Rain" by Shawn Carlson Scientific American, August 1997 Read the articles, build the equipment, use it, and decide for yourself what's going on. 73, Tom Donaly, KA6RUH I want to thank Tom Donaly for mentioning these articles. I worked very hard of them back when I used to write for Scientific American and I still think these are great resources. "Getting a Charge Out of Rain" is actually my favorite of the projects, and it's one I invite everyone to try. The apparatus described in the article allows one to measure the electric charge on individual drops of rain as they fall in a summer storm. The instrument set a new standard for measuring charges on droplets because the device is intrinsically calibrated. The calibration is achieved by using a precision capacitor. Since the value of the capacitance is precisely known, the charge on the falling drop can be determined by simple geometry and the size of the voltage pulse generated as it falls through the detector. As I understand it, some folks who do these kinds of measurements professionally redesigned their detectors to take advantage of the technique that this article introduced. If you can't find a copy of these articles in your local library, they are available on The Amateur Scientist 3.0 CD-ROM, which is my personal archive of all the articles that ever appeared in The Amateur Scientist department of Scientific American going back to the beginning in 1927. (Over 1000 projects.) You can find it either on Amazon or on my own web site at http://www.brightscience.com Hi Dr. Shawn, I'm glad you've posted here. The link provided offers just exactly what I've been looking for. Thanx. 73's Richard Clark, KB7QHC |
Rain Static ?
"Cecil Moore" wrote in message t... snip I just heard on The Discovery Channel that a certain percentage of the static we hear is left over from the Big Bang that happened some 12.5 billion years ago. Yes and no. There certainly is something termed galactic noise and most of it has apparently been ricocheting around the cosmos all this time. It was first discovered by Bell Labs scientists using a supercooled microwave amplifier whose noise was higher than expected. They covered the feedhorn and lo! ... The noise dropped! http://www.amsat.org/amsat/archive/a.../msg00336.html retells part of the story. There's no way any of us will be affected by galactic background, however, We'd need a system noise temperature better than 3K (That's 3 Kelvin, not 3,000) to detect it. The best consumer LNA's are way noisier. BTW, some parts of the sky are "hotter" than this background level; if we use a low noise TVRO dish system, we could detect a few star clusters. Of course the sun and the moon can be detected. |
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