tag:blogger.com,1999:blog-22973357.post4635326871512463441..comments2023-09-27T07:44:19.769-04:00Comments on Sabine Hossenfelder: Backreaction: Water in Zero GravitySabine Hossenfelderhttp://www.blogger.com/profile/06151209308084588985noreply@blogger.comBlogger20125tag:blogger.com,1999:blog-22973357.post-68407382076544584822007-01-28T01:52:00.000-05:002007-01-28T01:52:00.000-05:00nice video!
and i have had a similar experience to...nice video!<br />and i have had a similar experience too(well i think) when i on the window AC and the celing fan together the room kinda reamins at same temperature ....The cool air stays down but when it becomes warm it moves towards the fan which kinda beats it up...(or maybe im entirely wrong)Visheshhttps://www.blogger.com/profile/14452040774198026145noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-70090953809022246292007-01-28T00:17:00.000-05:002007-01-28T00:17:00.000-05:00Stephan and Bee, thanks for answering my question!...Stephan and Bee, thanks for answering my question! That's funny about the waves in the coffee cup because I see them too, but just didn't know what they were called. ;-) And, yeah, the surface tension of water always kind of amazes me and seeing it in no gravity is so cool.Rae Annhttps://www.blogger.com/profile/10239791074376508016noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-61526943125114117212007-01-26T08:32:00.000-05:002007-01-26T08:32:00.000-05:00Hi Plato,
regarding brain stretching, see also :...Hi Plato, <br /><br />regarding brain stretching, <a href="http://backreaction.blogspot.com/2007/01/brain-stretching.html">see also :-)</a> Best,<br /><br />B.Sabine Hossenfelderhttps://www.blogger.com/profile/06151209308084588985noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-22430830911707385272007-01-26T08:05:00.000-05:002007-01-26T08:05:00.000-05:00And if I may, one might call it "Stretching the Br...And if I may, one might call it "<a href="http://eskesthai.blogspot.com/2005/03/stretching-brain.html">Stretching the Brain</a>?":)<br /><br />Yes, under a "guiding hand" this thinking can be most defintiely be wrong, so of course I rely on the experts "to criticize" so as not to lead anyone astray.<br /><br />ThanksPlatoHagelhttps://www.blogger.com/profile/00849253658526056393noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-33361234265036572312007-01-26T07:58:00.000-05:002007-01-26T07:58:00.000-05:00I like the idea working with no gravity.
I creat...I like the idea working with no gravity. <br /><br />I created a link to "this post" as well as point toward this one <a href="http://eskesthai.blogspot.com/2005/09/new-conceptualization-distance-on.html">here</a><br /><br />What Stefan said "about intuiting" is like "setting the stage" for what works in the "gravity free environment." Yes "condense matter physics", but as to the "geometric PlatoHagelhttps://www.blogger.com/profile/00849253658526056393noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-67600288137611281852007-01-25T17:30:00.000-05:002007-01-25T17:30:00.000-05:00PPS - What do you think of the US Military Active ...<i>PPS - What do you think of the US Military Active Denial System Supposed to fire a pulse that boils the water under your skin - thus encouraging crowds (or was it clouds) to disperse - lol! </i><br /><br />I like the word 'active denial system' (AdS?) Is that somewhere encoded in the DNA?Sabine Hossenfelderhttps://www.blogger.com/profile/06151209308084588985noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-66805254944767825792007-01-25T17:28:00.000-05:002007-01-25T17:28:00.000-05:00Dear Quasar,
Did I miss how they keep the bubble ...Dear Quasar,<br /><br /><i>Did I miss how they keep the bubble of water that large - and prevent it dividing into smaller bubbles</i><br /><br />One large bubble is the configuration with the smallest surface. If you'd divide it into smaller bubbles the surface grows, and it's no longer energetically optimal. That is why the bubbles join to form a large one. I would think in the movie they Sabine Hossenfelderhttps://www.blogger.com/profile/06151209308084588985noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-526163062305717582007-01-25T17:27:00.000-05:002007-01-25T17:27:00.000-05:00PPS - What do you think of the US Military Active ...PPS - What do you think of the US Military Active Denial System<br /><br />Supposed to fire a pulse that boils the water under your skin - thus encouraging crowds (or was it clouds) to disperse - lol!QUASAR9https://www.blogger.com/profile/00593390598251093182noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-54989481758589025932007-01-25T17:23:00.000-05:002007-01-25T17:23:00.000-05:00Hi Bee, Awesome video
Did I miss how they keep the...Hi Bee, Awesome video<br />Did I miss how they keep the bubble of water that large - and prevent it dividing into smaller bubbles<br /><br />PS - We do have bubbles of water in vapour - clouds<br />When the droplets grow, it rains!QUASAR9https://www.blogger.com/profile/00593390598251093182noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-32347103883870831532007-01-25T17:16:00.000-05:002007-01-25T17:16:00.000-05:00Dear Stefan,
yeah, I thought vaguely along the sa...Dear Stefan,<br /><br />yeah, I thought vaguely along the same lines. A drawback I see is the location of the heater, and the fixed volume so you don't actually complete the phase transition. Wouldn't it be nicer to make some of these experiments we were shown in Thermodynamics were the phase transition is caused by volume expansion/compression or so? I mean, I'd think one would see the bubbles Sabine Hossenfelderhttps://www.blogger.com/profile/06151209308084588985noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-79822564643868850312007-01-25T16:12:00.000-05:002007-01-25T16:12:00.000-05:00Dear Rea Ann,
Do you get any deep insights about...Dear Rea Ann,<br /><br /><br /><i>Do you get any deep insights about how the water acts in zero gravity?</i><br /><br />Let me just expand on Bee's comment :-)<br /><br />I would say its not so much about water as such that you can learn something in these experiments, but about the generic behaviour of fluids with a surface tension. And because gravity is switched off, you see just all kinds of stefanhttps://www.blogger.com/profile/09495628046446378453noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-69023912768137586352007-01-25T16:06:00.000-05:002007-01-25T16:06:00.000-05:00Radiant heating systems are traditionally installe...Radiant heating systems are traditionally installed in the <a href=http://www.clarkpublicutilities.com/Residential/TheEnergyAdviser/Archives2005/05_02_20>ceilings</a>. The heat gets to you by thermal radiation (photons). They are as efficient as any other electric heating system, and are considered quite comfortable. They are supposed to allow you to keep your air temperature lower than you CarlBrannenhttps://www.blogger.com/profile/17180079098492232258noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-70535719408941426562007-01-25T15:44:00.000-05:002007-01-25T15:44:00.000-05:00Hi Rae Ann,
Do you get any deep insights about ho...Hi Rae Ann,<br /><br /><i>Do you get any deep insights about how the water acts in zero gravity?</i><br /><br />Ah, well, I don't. But I guess zero gravity allows to make some studies more precisely by excluding additional gravitational contributions. E.g. the surface tension of the water bubbles is far more obvious. I'm not sure though if water is such an exciting thing to study, but I bet they Sabine Hossenfelderhttps://www.blogger.com/profile/06151209308084588985noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-50506569558433403962007-01-25T14:35:00.000-05:002007-01-25T14:35:00.000-05:00Hi Bee, yeah, heat in the floors is really nice. ...Hi Bee, yeah, heat in the floors is really nice. One of my college dorms had that. I meant to comment about how cool the zero gravity water is, but my computer froze up. Do you get any deep insights about how the water acts in zero gravity? Or is all of that pretty much basic knowledge (that I'm lacking)? I guess I'd like to imagine that the Universe as a whole might look like that if you Rae Annhttps://www.blogger.com/profile/10239791074376508016noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-65425734462048036302007-01-25T14:30:00.000-05:002007-01-25T14:30:00.000-05:00Wow,
these movies are really amazing!
I especial...Wow,<br /><br />these movies are really amazing!<br /><br />I especially like the youtube one with these three experiments inside the big water bubble. There are so many phenomena it makes you think of...<br /><br />First order phase transitions are fascinating ;-)<br /><br />Thank you, Bee :-)<br /><br />stefanstefanhttps://www.blogger.com/profile/09495628046446378453noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-21074889950709159912007-01-25T12:30:00.000-05:002007-01-25T12:30:00.000-05:00Without meaning to sound too morbid, this film cli...Without meaning to sound too morbid, this film clip demonstrating a puff of air being injected into a water sphere grossly reminds me of seeing a coup-contrecoup head injury.;( Needless to say, it ain't a pretty sight.<br /><br />By the way, arun, very good advise!<br /><br />Best,<br />CynthiaAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-22973357.post-28742151119382132952007-01-25T12:11:00.000-05:002007-01-25T12:11:00.000-05:00it's kinda hard to get something screwed to the ce...it's kinda hard to get something screwed to the ceiling, seems there's resistance close below the surface...Sabine Hossenfelderhttps://www.blogger.com/profile/06151209308084588985noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-57419751541141248392007-01-25T11:54:00.000-05:002007-01-25T11:54:00.000-05:00Install a ceiling fan.Install a ceiling fan.Arunhttps://www.blogger.com/profile/03451666670728177970noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-42343726783320971942007-01-25T11:21:00.000-05:002007-01-25T11:21:00.000-05:00Hi Rae Ann,
I've never heard of ceil heat before ...Hi Rae Ann,<br /><br />I've never heard of ceil heat before I moved here. The apartment where I grew up had the heating in the floor, which was really nice for us kids. I'm not sure but the building I live in isn't really that old, I'd guess it was built some time in the late 70ies or so (judging on windows, doors, bathroom, ventilation, etc). Anyway, the landlord pays heating, water, electricitySabine Hossenfelderhttps://www.blogger.com/profile/06151209308084588985noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-1895951583468593592007-01-25T11:11:00.000-05:002007-01-25T11:11:00.000-05:00Actually, heat in the ceiling used to be pretty co...Actually, heat in the ceiling used to be pretty common in the US back in the forties and fifties and maybe later. Our first house was built in around 1949 and had "Ceil Heat" that had been disconnected by some previous owners. Most people soon realized how inefficient Ceil Heat was and had those systems replaced. Is your apartment old? I haven't seen a working Ceil Heat system since I was a Rae Annhttps://www.blogger.com/profile/10239791074376508016noreply@blogger.com