A second flywheel spinning in the opposite direction WILL cancel the inherent stability in the first. Some people added a free-spinning third wheel to the front of their bike for a demo once. The bike did not become stable as normal when it was moving. For a do-it-yourself demonstration of the ill effect of having a single gyro spin the WRONG way, try riding your bike as it rolls backwards down an incline. NEGATIVE stability if there ever was any.
FYI, "gyro" (Greek) is pronounced "euro", or something very close. Whenever anyone I know talks about what they bought at the local Greek takeout restaurant, I have to take a few seconds to get it into my little noggin that no, they DIDN'T ingest money.
I'm wondering about stepper motors. In a stepper motor, doesn't DC go through the coils? I assume this because some stepper motors are designed to hold a position, which wouldn't really be possible with AC (magnets switching poles all the time). I understand that there are very large stepper motors in use (maybe I understand incorrectly) in industries.
If "DEBs" is in reference to Decibels, there is no answer. A Decibel is a measure of volume of a sound, whereas the RPM of a flywheel changes the frequency of the sound produced, which is measured in Hz. The mass of the flywheel is what affects the volume of the sound, by affecting the amplitude of the wave. A 36,000 RPM flywheel that weighs as much as a car is likely to generate a high volume sound, unless of course it is housed in a vacuum, which is VERY likely. A 36,000 RPM flywheel with the mass of a junebug won't generate a very loud sound. Of course, it is all relative because the surface area of the container can affect volume, as well as the surface area/texture of the flywheel. My $0.02 CDN.
From my limited observations of the Reuters photos and BBC video clip, it appears that the booster rocket left the pad without the test glider. Immediately after leaving the launch rails, the booster tipped over, indicating that there was an unintentional mass imbalance (hence, gimballed boosters counteracting a non-existent payload) that threw the flight path out of whack. Can anyone tell whether the rocket flopped away from where the payload should have been, or in another direction. If it fell away from the payload, the payload must have become unattached.
I have no reference websites to be slashdotted, but on a more serious note NASA did in fact have something to do with a laser on the moon. I forget why, but they bounced a laser off a mirror that was set up on the surface by Apollo astronauts. Come to think of it, it was some experiment to find out how far away the moon is. Although I'm sure that they would have figured that out before they sent the Apollos...
Perhaps someone knows more about it?
This device could be likened to the phone in the comedy skit The Brain Cellular by Radio Free Vestibule (now The Vestibules). The guy gets a cell phone implanted in his brain and it turns out his number used to belong to a major airline ticket service. Listen to it to hear the full story...
From experience as a web browser, I find that a majority of websites are created to support IE. The versions of Netscape that I am slightly familiar with have great difficulty adhering to CSS and HTML standards. For example, Netscape seems to have difficulty accepting that if a stylesheet specifies a black background and white text, the page should be displayed that way. Netscape in this very isolated example displays the background correctly, but the black text that should be white is unreadable. My website passes the W3C validation tests for CSS and HTML, but still doesnt display correctly on Netscape. Many windows users have both Netscape and IE installed, and my acquaintances that have Netscape usually revert to IE after ten pages don't display correctly. Until this is fixed, there will be customer dissatisfaction.
Just my two cents.
I have never taken a CS course, but let me throw an idea at my fellow/.ers. From my reading of the posts, it seems that people are assuming that if an exam is to be taken on a computer, a debugging compiler is automatically present. The limitation of plain paper exams is that the coder must in effect write everything in a linear fashion or face space restrictions. Perhaps the simple solution would be to allow the use of a plain text editor (vi, emacs) but lock down all other software on the machines. I know this is either impossible or too time consuming, but at least the coder could insert lines/blocks in the code easily.
[corny_joke--]Since EVERYONE has broadband Internet, why don't game servers simply run instances of the game over VNC?[--corny_joke]
Actually, on a serious note, IFF the game was played over a LAN or Internet backbone, and the server was powerful enough to handle the players, I think that WOULD be a neat concept to at least explore. Thin-client gaming!
Don't quote me on this, but I once heard something about AC blasting one's hands from the place of contact and DC causing the muscles to clamp on. Something to do with the fact that the direction of current changing creates a replusive force of sorts (because of the body's capacitance?) while unidirectional current does not.
AotC was shown in 1600 fewer theatres than Spiderman, because Lucas refused to have AotC shown in theatres without digital THX sound. Demand was not the main factor.
Slashdot Mirror
A second flywheel spinning in the opposite direction WILL cancel the inherent stability in the first. Some people added a free-spinning third wheel to the front of their bike for a demo once. The bike did not become stable as normal when it was moving. For a do-it-yourself demonstration of the ill effect of having a single gyro spin the WRONG way, try riding your bike as it rolls backwards down an incline. NEGATIVE stability if there ever was any.
FYI, "gyro" (Greek) is pronounced "euro", or something very close. Whenever anyone I know talks about what they bought at the local Greek takeout restaurant, I have to take a few seconds to get it into my little noggin that no, they DIDN'T ingest money.
Isn't resistance proportional to the SQUARE of the distance, or am I confusing that with resistance being proportional to the cross-sectional area? ...
I'm wondering about stepper motors. In a stepper motor, doesn't DC go through the coils? I assume this because some stepper motors are designed to hold a position, which wouldn't really be possible with AC (magnets switching poles all the time). I understand that there are very large stepper motors in use (maybe I understand incorrectly) in industries.
If "DEBs" is in reference to Decibels, there is no answer. A Decibel is a measure of volume of a sound, whereas the RPM of a flywheel changes the frequency of the sound produced, which is measured in Hz. The mass of the flywheel is what affects the volume of the sound, by affecting the amplitude of the wave. A 36,000 RPM flywheel that weighs as much as a car is likely to generate a high volume sound, unless of course it is housed in a vacuum, which is VERY likely. A 36,000 RPM flywheel with the mass of a junebug won't generate a very loud sound. Of course, it is all relative because the surface area of the container can affect volume, as well as the surface area/texture of the flywheel. My $0.02 CDN.
From my limited observations of the Reuters photos and BBC video clip, it appears that the booster rocket left the pad without the test glider. Immediately after leaving the launch rails, the booster tipped over, indicating that there was an unintentional mass imbalance (hence, gimballed boosters counteracting a non-existent payload) that threw the flight path out of whack. Can anyone tell whether the rocket flopped away from where the payload should have been, or in another direction. If it fell away from the payload, the payload must have become unattached.
I have no reference websites to be slashdotted, but on a more serious note NASA did in fact have something to do with a laser on the moon. I forget why, but they bounced a laser off a mirror that was set up on the surface by Apollo astronauts. Come to think of it, it was some experiment to find out how far away the moon is. Although I'm sure that they would have figured that out before they sent the Apollos... Perhaps someone knows more about it?
This device could be likened to the phone in the comedy skit The Brain Cellular by Radio Free Vestibule (now The Vestibules). The guy gets a cell phone implanted in his brain and it turns out his number used to belong to a major airline ticket service. Listen to it to hear the full story...
I have no idea, I am only slightly familiar with Netscape, and I imagine it WAS an old version. But to fulfil the request: [stripped down]
; ;
<html>
<head>
<title>Netscape 6.2 or 7?</title>
<style>
body {
color : white
background-color : black
}
</style>
</head>
<body>
Sample text
</body>
</html>
From experience as a web browser, I find that a majority of websites are created to support IE. The versions of Netscape that I am slightly familiar with have great difficulty adhering to CSS and HTML standards. For example, Netscape seems to have difficulty accepting that if a stylesheet specifies a black background and white text, the page should be displayed that way. Netscape in this very isolated example displays the background correctly, but the black text that should be white is unreadable. My website passes the W3C validation tests for CSS and HTML, but still doesnt display correctly on Netscape. Many windows users have both Netscape and IE installed, and my acquaintances that have Netscape usually revert to IE after ten pages don't display correctly. Until this is fixed, there will be customer dissatisfaction. Just my two cents.
I have never taken a CS course, but let me throw an idea at my fellow /.ers. From my reading of the posts, it seems that people are assuming that if an exam is to be taken on a computer, a debugging compiler is automatically present. The limitation of plain paper exams is that the coder must in effect write everything in a linear fashion or face space restrictions. Perhaps the simple solution would be to allow the use of a plain text editor (vi, emacs) but lock down all other software on the machines. I know this is either impossible or too time consuming, but at least the coder could insert lines/blocks in the code easily.
[corny_joke--]Since EVERYONE has broadband Internet, why don't game servers simply run instances of the game over VNC?[--corny_joke] Actually, on a serious note, IFF the game was played over a LAN or Internet backbone, and the server was powerful enough to handle the players, I think that WOULD be a neat concept to at least explore. Thin-client gaming!
Seems to me that an article about RF congestion was posted earlier today...
Don't quote me on this, but I once heard something about AC blasting one's hands from the place of contact and DC causing the muscles to clamp on. Something to do with the fact that the direction of current changing creates a replusive force of sorts (because of the body's capacitance?) while unidirectional current does not.
AotC was shown in 1600 fewer theatres than Spiderman, because Lucas refused to have AotC shown in theatres without digital THX sound. Demand was not the main factor.
In Canada, our bills are different colours. Of course, the clerk may be colourblind. But hey, this is Canada, eh?