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Physiology & Medicine / Re: Which cells survive best without oxygen?
« on: Today at 19:52:56 »
Interestingly the retina malfunctions pretty quickly, losing color vision first, but generally recovers when reoxygenated.
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Physics, Astronomy & Cosmology / Re: What is the maximum dilution rate for oxygen in water?
« on: Today at 19:49:50 »
The smaller the bubble, the quicker it will dissolve. A single molecule will be absorbed almost instantaneously.
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Physics, Astronomy & Cosmology / Re: Can a photon be visualized ?
« on: Today at 19:46:31 »I don't live in Yorkshire, but know there are is at least 3 airports you can fly between without having to leave YorkshireI know - I have flown to at least 5 of them. Having been conceived in Co Durham I have the right to consider Yorkshire as a bit inferior, or at least south.
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Physiology & Medicine / Re: Which cells survive best without oxygen?
« on: Today at 10:35:57 »
Sadly, cancers.
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Technology / Re: What could make a coffee table explode?
« on: Today at 10:29:36 »
Toughened glass has a hard outer shell with the inner material under considerable pressure. Tiny scratches or surface defects act as stress multipliers and remarkably small thermal or mechanical stresses can cause the entire sheet to shatter into surprisingly even fragments. Randomly exploding windscreens were pretty much the norm in the 1970s but most new cars use laminated glass. Toughened glass is OK in a domestic environment because the fragments aren't particularly sharp and it is clearer than laminated material.
Interesting to have an hourglass in an office. Probably bought with matching quill pens and A4 parchment.
Interesting to have an hourglass in an office. Probably bought with matching quill pens and A4 parchment.
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Just Chat! / Re: 4 Interesting Facts About Astrology You Should Probably Know
« on: Today at 10:20:50 »
Practically every jazz band leader you have heard of, is a Gemini. Most of the great drummers are Capricorn. "88" was the Nazi code for Adolf Hitler. Believe whatever you want, but please don't pass on the infection.
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Physics, Astronomy & Cosmology / Re: Do protons of the Fermilab proton beam exist?
« on: Yesterday at 23:17:06 »
Quantum mechanics. Subatomic particles don't behave like billiard balls.
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Physics, Astronomy & Cosmology / Re: Can a photon be visualized ?
« on: Yesterday at 18:16:53 »
Sorry, flummoxed, but you seem to be ploughing a lonely furrow to nowhere. If you can't accept the basic fact that accelerating electrons generate photons, you won't harvest any physics or understand why we abondoned orbits and invented quantum mechanics.
Good luck in your quest, and farewell.
Good luck in your quest, and farewell.
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Physics, Astronomy & Cosmology / Re: Can a photon be visualized ?
« on: Yesterday at 16:29:26 »
Photons are generated by electrons changing energy levels in atoms.
Or by free electrons decelerating in a target, or accelerating in a wiggler. Same principle as radio waves, just higher energies. And of course some nuclei emit photons with no electron involvement at all.
Fascinating stuff, physics.
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Physiology & Medicine / Re: Can contaminants in food cause water retention?
« on: Yesterday at 12:38:36 »
Found this slogan in New Zealand: "Rugby- no helmet, no armour, just balls."
And on the subject of lager, there was a news item on Radio 4 this morning. Carling are dropping the "probably the best beer.." after several complaints, including "tastes like the bathwater my Nan died in".
And on the subject of lager, there was a news item on Radio 4 this morning. Carling are dropping the "probably the best beer.." after several complaints, including "tastes like the bathwater my Nan died in".
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Physiology & Medicine / Re: Can contaminants in food cause water retention?
« on: Yesterday at 08:50:33 »
You need a full load of estrogen to drink lager in the first place.
I was always impressed with Tetleys: they sell one warm brown fluid in different guises: tea, coffee and beer. They all taste exactly the same. My passport is stamped "NO FLY LEEDS" because I happened to mention it over lunch.
Whilst on the subject, I casually remarked in the bar of The Cricketers that all the photographs on the wall were of Yorkshire players except W G Grace, who never played for Yorkshire. The barman said "'Appen not, but 'e were good enough". Rail pass now stamped "NOT VIA LEEDS".
For those unfamiliar with Little Texas, search YouTube for "Yorkshire Airlines".
I was always impressed with Tetleys: they sell one warm brown fluid in different guises: tea, coffee and beer. They all taste exactly the same. My passport is stamped "NO FLY LEEDS" because I happened to mention it over lunch.
Whilst on the subject, I casually remarked in the bar of The Cricketers that all the photographs on the wall were of Yorkshire players except W G Grace, who never played for Yorkshire. The barman said "'Appen not, but 'e were good enough". Rail pass now stamped "NOT VIA LEEDS".
For those unfamiliar with Little Texas, search YouTube for "Yorkshire Airlines".
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New Theories / Re: How do we measure the energy of a photon?
« on: Yesterday at 08:39:35 »Because it isn't true. We abandoned "orbits" about 100 years ago because they never made sense.The mechanism by which an electron emits a photon and falls to a lower orbit is not understood in physics.I repeat this assertion. I would be pleased to be convinced otherwise.
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Physiology & Medicine / Re: Can contaminants in food cause water retention?
« on: 16/04/2019 22:50:17 »it foams as it comes out of the tap, has a horrible metalic taste etc.The brown foamy stuff is called beer. It's supposed to taste like that.
Fact is that London and Essex water is dead hard, like us. You can stand a spoon up in it and a wet shave puts hair on yer chest, mate. We even have special tea for hard water 'cos that wet northern stuff don't cut it. Why do they call them jellied eels? Cos you ave to blast them out of the Thames wiv gelignite, the water's that hard.
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Physics, Astronomy & Cosmology / Re: Could the universe be a simulation?
« on: 16/04/2019 22:40:26 »
My contempt for philosophers grows daily.
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Physiology & Medicine / Re: Can contaminants in food cause water retention?
« on: 16/04/2019 18:31:32 »
Estrogen. Lots of it in Thames water.
Gaining a couple of kilos overnight would be quite a feat, with boxers, wrestlers, rugby players and weightlifters queuing round the block for whatever magic food does this. Most people lose a few hundred grams of sweat, exhalate, urine and faeces between supper and breakfast.
Gaining a couple of kilos overnight would be quite a feat, with boxers, wrestlers, rugby players and weightlifters queuing round the block for whatever magic food does this. Most people lose a few hundred grams of sweat, exhalate, urine and faeces between supper and breakfast.
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Technology / Re: Where is the sweet spot on a baseball bat?
« on: 16/04/2019 18:22:59 »
Try it and see! I remember doing the experiment in my schooldays and being impressed with the result.
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Technology / Re: Where is the sweet spot on a baseball bat?
« on: 16/04/2019 10:04:22 »
It's a bit more complicated as you are looking for the point of dynamic (Σmr2) rather than static (Σmr) balance. The pendulum method certainly works well for baseball and cricket bats. I think the CG of a tennis racquet is on the wood, not the middle of the stringing.
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Technology / Re: How underwater cable connectors work?
« on: 15/04/2019 19:17:10 »
Either make the connection in air, wrap it in plastic and then submerge it (if you can't pull the cable up from the sea floor, use a diving bell) or use AC magnetic coupling (like a contactless phone charger).
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Technology / Re: Where is the sweet spot on a baseball bat?
« on: 15/04/2019 19:11:24 »
It's at the point where a simple pendulum (small heavy weight on a light string) swings at the same rate as the bat held by the end of the handle. Same applies to cricket bats and tennis racquets.
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Physics, Astronomy & Cosmology / Re: Could the universe be a simulation?
« on: 15/04/2019 19:06:45 »
Simulation of what?