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The article on Catenane says that "The interlocked rings cannot be separated without breaking the covalent bonds of the macrocycles", but no source is cited. Is this correct? As two covalent bonds come closer to crossing one another, couldn't the entangled electrons of one bond tunnel through the point of the other pair and hence break the chain without breaking either of the two macrocycles? 203.27.72.5 ( talk) 03:37, 28 May 2012 (UTC)
In general, out of all the different materials that water bottles are made up of, which has the lowest heat conductivity. The other day, I saw a Voss bottle (which is cool because it is made up of glass). So I started thinking about is a plastic bottle better or glass. I want the water to stay cool as long as possible in ambient air temperature so that it doesn't warm up quickly. I understand that it would also make it tougher for the refrigerator to cool the water down (low heat conductivity works both ways, right?). So someone who knows more about the types of plastics and glass used to make consumer grade commercial water bottles, which kind is better? I don't use a thermos or anything. I just buy bottled water and then just use the bottle and replace it maybe every six months or so. Doesn't plastic also break down quicker (into carcinogenics) with heat acting as a catalyst? I remember my chemistry teacher vaguely saying something like this. - Looking for Wisdom and Insight! ( talk) 05:45, 28 May 2012 (UTC)
That is true that the glass bottle does feel much cooler but the water also feels cooler to me longer than it would from a plastic bottle. So the glass takes the heat in from its outside environment (because it is hotter) and then transfers that heat to the water more efficiently to heat it up? So a glass bottle warms up the water better until the inside and outside reach thermal equilibrium? Could it be just a weird perception error on my part? Like I touch the bottle, it feels very cool so I say to myself that the water is cool too while it may not really be? Or is there a scientific explanation for this and the glass bottle really does keep the water cooler for longer? I am thinking heat capacity, if the glass has high heat capacity then wouldn't it just absorb the heat from both sides and keep both sides cool? Cool to the touch and cool water? - Looking for Wisdom and Insight! ( talk) 20:15, 28 May 2012 (UTC)
That's taken from page 103 of my copy of Ringworld. This Blind Spot is mentioned a few other times previously in the book and I didn't think too much of it because I figured some explanation of it would come. I don't think I've come across one though. Can anyone tell me what this Blind Spot would be? Thanks, Dismas| (talk) 10:42, 28 May 2012 (UTC)
Thanks for all that. I was hesitant to read too much about the book or the universe in it for fear of any spoilers. Dismas| (talk) 00:23, 29 May 2012 (UTC)
Timo Vuorensola, the director of Iron Sky says in this BBC article that algae was found on the moon. I cannot find anything on the internet about this, and it is the first time I've heard it. Surely, if it were true, it would be common knowledge, being a pretty sensational discovery. Is it true? Can anyone find any reliable reference about it? KägeTorä - (影虎) ( TALK) 13:17, 28 May 2012 (UTC)
Followers of the zombie genre have little difficulty explaining a recent face-eating cannibal attack in Miami. But police are quoted claiming it was due to "a new form of LSD". [2] Now of course there is only one lysergic acid diethylamide, and my understanding is hallucinogens of this class are generally credited with leaving an unaffected "watcher", some part of the brain which continues to monitor self-preservation and basic morality. ( Henbane/ scopolamine, on the other hand, who knows?) Anyway - anybody know what "new kind of LSD" that the police might be talking about? Wnt ( talk) 21:55, 28 May 2012 (UTC)
Science desk | ||
---|---|---|
< May 27 | << Apr | May | Jun >> | May 29 > |
Welcome to the Wikipedia Science Reference Desk Archives |
---|
The page you are currently viewing is an archive page. While you can leave answers for any questions shown below, please ask new questions on one of the current reference desk pages. |
The article on Catenane says that "The interlocked rings cannot be separated without breaking the covalent bonds of the macrocycles", but no source is cited. Is this correct? As two covalent bonds come closer to crossing one another, couldn't the entangled electrons of one bond tunnel through the point of the other pair and hence break the chain without breaking either of the two macrocycles? 203.27.72.5 ( talk) 03:37, 28 May 2012 (UTC)
In general, out of all the different materials that water bottles are made up of, which has the lowest heat conductivity. The other day, I saw a Voss bottle (which is cool because it is made up of glass). So I started thinking about is a plastic bottle better or glass. I want the water to stay cool as long as possible in ambient air temperature so that it doesn't warm up quickly. I understand that it would also make it tougher for the refrigerator to cool the water down (low heat conductivity works both ways, right?). So someone who knows more about the types of plastics and glass used to make consumer grade commercial water bottles, which kind is better? I don't use a thermos or anything. I just buy bottled water and then just use the bottle and replace it maybe every six months or so. Doesn't plastic also break down quicker (into carcinogenics) with heat acting as a catalyst? I remember my chemistry teacher vaguely saying something like this. - Looking for Wisdom and Insight! ( talk) 05:45, 28 May 2012 (UTC)
That is true that the glass bottle does feel much cooler but the water also feels cooler to me longer than it would from a plastic bottle. So the glass takes the heat in from its outside environment (because it is hotter) and then transfers that heat to the water more efficiently to heat it up? So a glass bottle warms up the water better until the inside and outside reach thermal equilibrium? Could it be just a weird perception error on my part? Like I touch the bottle, it feels very cool so I say to myself that the water is cool too while it may not really be? Or is there a scientific explanation for this and the glass bottle really does keep the water cooler for longer? I am thinking heat capacity, if the glass has high heat capacity then wouldn't it just absorb the heat from both sides and keep both sides cool? Cool to the touch and cool water? - Looking for Wisdom and Insight! ( talk) 20:15, 28 May 2012 (UTC)
That's taken from page 103 of my copy of Ringworld. This Blind Spot is mentioned a few other times previously in the book and I didn't think too much of it because I figured some explanation of it would come. I don't think I've come across one though. Can anyone tell me what this Blind Spot would be? Thanks, Dismas| (talk) 10:42, 28 May 2012 (UTC)
Thanks for all that. I was hesitant to read too much about the book or the universe in it for fear of any spoilers. Dismas| (talk) 00:23, 29 May 2012 (UTC)
Timo Vuorensola, the director of Iron Sky says in this BBC article that algae was found on the moon. I cannot find anything on the internet about this, and it is the first time I've heard it. Surely, if it were true, it would be common knowledge, being a pretty sensational discovery. Is it true? Can anyone find any reliable reference about it? KägeTorä - (影虎) ( TALK) 13:17, 28 May 2012 (UTC)
Followers of the zombie genre have little difficulty explaining a recent face-eating cannibal attack in Miami. But police are quoted claiming it was due to "a new form of LSD". [2] Now of course there is only one lysergic acid diethylamide, and my understanding is hallucinogens of this class are generally credited with leaving an unaffected "watcher", some part of the brain which continues to monitor self-preservation and basic morality. ( Henbane/ scopolamine, on the other hand, who knows?) Anyway - anybody know what "new kind of LSD" that the police might be talking about? Wnt ( talk) 21:55, 28 May 2012 (UTC)