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Scuba Forum / General / December 2005Capillary Rise
· Describe the capillary rise of a wetting liquid in a vertical capillary tube. Define the wetting angle. Which forces act on the water column? · What happens if the tube is horizontal? > · Describe the capillary rise of a wetting > liquid in a vertical capillary tube. Define > the wetting angle. Which forces act on > the water column? As every diver learns, h={{2T\cos{\theta}}\over{\rho g r}} where T = surface tension (J/m²) θ = contact angle ρ = density of liquid (kg/m3) g = acceleration due to gravity (m/s²) r = radius of tube (m) > · What happens if the tube is horizontal? As every perfectly horizontal DIR diver learns, g = 0 and theta cannot be calculated; there is no capillarity. Thank you for visiting rec.scuba, the ultimate source of knowledge of things wet. esg >> · Describe the capillary rise of a wetting >> liquid in a vertical capillary tube. Define >> the wetting angle. Which forces act on >> the water column? > > As every diver learns, h={{2T\cos{\theta}}\over{\rho g r}} That didn't come out the way I wrote it. Damn browser! h = 2T cos theta / p g r and that's why we use pressure instead of capillary gauges >>> · Describe the capillary rise of a wetting >>> liquid in a vertical capillary tube. Define [quoted text clipped - 8 lines] > >and that's why we use pressure instead of capillary gauges Sheesh. That's all greek to me. JF >>>> · Describe the capillary rise of a wetting >>>> liquid in a vertical capillary tube. Define [quoted text clipped - 9 lines] > > Sheesh. That's all greek to me. almost! so close. if you had said "thats all geek to me" that would have been LOTDA material. > JF > >>> · Describe the capillary rise of a wetting > >>> liquid in a vertical capillary tube. Define [quoted text clipped - 10 lines] > > Sheesh. That's all greek to me. Very large Greek letters though on this reader. >> · Describe the capillary rise of a wetting >> liquid in a vertical capillary tube. Define [quoted text clipped - 18 lines] > Thank you for visiting rec.scuba, the ultimate source of knowledge of > things wet. The radius of the tube becomes infinite and the capillarity approaches 0 asymptotically. Lee >>>· What happens if the tube is horizontal? >> [quoted text clipped - 6 lines] > The radius of the tube becomes infinite and the capillarity approaches 0 > asymptotically. That's the stroke explanation. m >>>>· What happens if the tube is horizontal? >>> [quoted text clipped - 8 lines] > > That's the stroke explanation. You expected anything else? Lee >The radius of the tube becomes infinite and the capillarity approaches 0 >asymptotically. Okay. I got it, I think. So we're talking about a really really fat dooby, and as the paper quality increases the simpler it tokes? How'd I do? JF >>The radius of the tube becomes infinite and the capillarity approaches 0 >>asymptotically. [quoted text clipped - 5 lines] > > How'd I do? Not very well. Capillarity only refers to liquids. He was using a bong. Lee >>>The radius of the tube becomes infinite and the capillarity approaches 0 >>>asymptotically. [quoted text clipped - 7 lines] > >Not very well. Capillarity only refers to liquids. He was using a bong. Okay. A bong with a paper filter. I'm sure Fram must make something suitable for inline use. JF >>> How'd I do? >> >>Not very well. Capillarity only refers to liquids. He was using a bong. > > Okay. A bong with a paper filter. I'm sure Fram must make something > suitable for inline use. Better. > >>> How'd I do? > >> [quoted text clipped - 4 lines] > > Better. I dunno. When we were kids, we always enjoyed the u joint from a vacuun cleaner and some tinfoil with holes poked in it. Um, what were talking about? Oh yeah, and let us not leave out The Who. "Don't get fooled again . . ." (song lyrics) >I dunno. When we were kids, we always enjoyed the u joint from a vacuun >cleaner and some tinfoil with holes poked in it. TMI kiddo. There might be impressionable kids lurking. JF > >I dunno. When we were kids, we always enjoyed the u joint from a vacuun > >cleaner and some tinfoil with holes poked in it. > > > TMI kiddo. There might be impressionable kids lurking. You actually think a kid(s) would be interested in following the diatribes around here? >> >I dunno. When we were kids, we always enjoyed the u joint from a vacuun >> >cleaner and some tinfoil with holes poked in it. [quoted text clipped - 3 lines] >You actually think a kid(s) would be interested in following the diatribes >around here? There's always the monologues. JF > > >I dunno. When we were kids, we always enjoyed the u joint from a vacuun > > >cleaner and some tinfoil with holes poked in it. [quoted text clipped - 3 lines] > You actually think a kid(s) would be interested in following the diatribes > around here? Why not? Keeps you and John perched on your seats. > TMI kiddo. There might be impressionable kids lurking. Nawh, the WebTV weenies don't stay around that long... Plus, they're too dumb to be impressionable... >> TMI kiddo. There might be impressionable kids lurking. > >Nawh, the WebTV weenies don't stay around that long... Plus, they're too >dumb to be impressionable... The only impression I seem to make is when I press my thumb on the soft spot on their skulls. (trivia, it's called a fontanel)  Signaturedillon 666 permissions of the beast >> >>> How'd I do? >> >> [quoted text clipped - 8 lines] >I dunno. When we were kids, we always enjoyed the u joint from a vacuun >cleaner and some tinfoil with holes poked in it. Toilet paper roll and foil. When you're done, burn the puppy, no evidence. >Um, what were talking about? I don't have the foggiest. I've never been convicted of doing anything illegal in my life. >Oh yeah, and let us not leave out The Who. > >"Don't get fooled again . . ." (song lyrics) > Signaturedillon 666 permissions of the beast > I don't have the foggiest. I've never been convicted of doing > anything illegal in my life. No tickets? > > I don't have the foggiest. I've never been convicted of doing >> anything illegal in my life. > >No tickets? Defensive driving. Signaturedillon 666 permissions of the beast > Defensive driving. What caliber? Lee >> Defensive driving. > >What caliber? > >Lee .40 S&W, of course. Signaturedillon 666 permissions of the beast >>> Defensive driving. >> [quoted text clipped - 3 lines] > > .40 S&W, of course. 8^) I like my .40 Glock pretty well, but I still much prefer my Beretta 92-F 9mm. It's simply the best autoloader I've ever owned. Unfortunately, it's not even close to concealable. Lee > I like my .40 Glock pretty well, but I still much prefer my Beretta 92-F > 9mm. It's simply the best autoloader I've ever owned. Unfortunately, it's > not even close to concealable. That's because you're in Florida... If you were in Canada during the winter, it would be concealable... But then the issue becomes being able to operate it while wearing mittens... > That's because you're in Florida... If you were in Canada during the > winter, > it would be concealable... But then the issue becomes being able to > operate > it while wearing mittens... I could always throw it. It's not likely that I'll ever have it in Canada. You see, I'm not a Canadian and only Canadians are smuggling guns into Canada. Lee > I don't have the foggiest. I've never been convicted of doing > anything illegal in my life. Convicted. Recently a law was passed prohibiting the smoking of tobacco in a park I used to sit in with my friends and openly smoke weed. Back then, it was a $100 fine to posess an ounce. If you had a quarter ounce, the fine was $25, half ounce $50, etc. Unless you were being an a.shole, the cops didnt care. We would sit there on the grass, pass a bowl and the cops would stroll right on by. The only way you ever got a ticket was if you were stupid, caught their eye, pissed them off, they had nothing else on you, and you smoked bunk. If you had good herb they'd let you go with a stern warning. Cops always had the best stash. The fine for smoking tobacco in the park is now $250. Gives me the warm and fuzzies, like I got away with something... > Back then, it was a $100 fine to posess an ounce. Basically that's it in "decriminalized" states. In Washington, it's a misdemeanor and people convicted of misdemeanors there are required to be incarcerated a minimum of 24 hours and fined a minimum of $250. You're better off switching to tobacco for illegal smoking in your park. In California, it used to be considered an "infraction", similar to a traffic ticket. Now it's called a misdemeanor, but still treated like an infraction - i.e., you just get a ticket instead of getting arrested and the maximum fine is $100. For a while (when a Republican ran the place) we were subject to the federal requirement that one convicted of simple possession lose his driver's license for 6 months. In California, that's almost as bad as a death sentence. Fortunately one of the many great things accomplished by Gray Davis was letting the law expire - now California is considered to have opted out of the federal law, just like Washington, and our driver's licenses are secure unless we actually get caught driving under the influence. Arnie isn't likely to change the status quo since he's an old pothead. When I become President, I will nominate Tommy Chong to be my drug czar and, instead of universal health care, we'll promote universal medical marijuana. Even if people are too poor to afford adequate health care, at least they'll be too stoned to care. >· Describe the capillary rise of a wetting >liquid in a vertical capillary tube. Define >the wetting angle. Which forces act on >the water column? > >· What happens if the tube is horizontal? For those who don't know, finals are next week. Looks like somebody blew off a couple weeks of chemistry. Signaturedillon 666 permissions of the beast · Describe the capillary rise of a wetting liquid in a vertical capillary tube. Define the wetting angle. Which forces act on the water column? · What happens if the tube is horizontal? it runs all over the floor ;0) |
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