Timeline for How could water breathing animals have a warm-blooded level of metabolism?
Current License: CC BY-SA 3.0
10 events
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Apr 13, 2017 at 12:52 | history | edited | CommunityBot |
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Jul 14, 2016 at 4:19 | comment | added | sh1 | If the opening of a gill is 1cm, then that's one linear metre of gill (eg., five 10cm slits on each side, but failing to specify the inlet dimensions), of some unspecified depth to give it 100% efficiency, so that and/or the speed needs scaling somewhat. I don't know what stops an animal being more extensively covered in gills -- perhaps durability in a fight? I guess using the same hole to breath and to kill things is an issue. Humans have given up a lot of their durability and compensated with intelligence and tools, so that might give merfolk some wiggle room. | |
Jul 13, 2016 at 20:54 | comment | added | JDługosz | I see your point: not a huge jet if the aperture is reasonably large (not a garden hose). | |
Jul 13, 2016 at 18:38 | comment | added | sh1 | Yes I did screw up. 1000cc/l, not 100. Should be 20cm per second (0.45mph), or equal to a relaxed pace for a diver. | |
Jul 13, 2016 at 18:27 | comment | added | sh1 | What's this "enormous jet"? I figure a 10cm x 10cm aperture must flow at only 2cm per second (0.045mph) to work through 120 litres per minute. A quick search suggests that's about 1/10 of a relaxed pace for a diver. Did I screw up? | |
Jun 5, 2016 at 13:18 | answer | added | DrBob | timeline score: 3 | |
Jun 5, 2016 at 11:09 | answer | added | lokimidgard | timeline score: 7 | |
Jun 5, 2016 at 10:38 | history | edited | JDługosz | CC BY-SA 3.0 |
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Jun 5, 2016 at 10:34 | answer | added | Mark Ripley | timeline score: 3 | |
Jun 5, 2016 at 10:10 | history | asked | JDługosz | CC BY-SA 3.0 |