John Cuthber
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Everything posted by John Cuthber
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Gravitation constant G can vary 0.1% in 6 years
John Cuthber replied to acsinuk's topic in Astronomy and Cosmology
Someone would have noticed. I'd cite this as probably the world's most famous piece of equipment that would have demonstrated such a change if it had taken place. https://en.wikipedia.org/wiki/Big_Ben#Clock -
Well what he said was "US protect Germany from russian chaos otherwise the level of living will be low." It's rather hard to know what he meant. it may be a reference to the Berlin airlift etc- this sort of thing https://en.wikipedia.org/wiki/Ich_bin_ein_Berliner in which case the fact that the Soviets had to build a wall to stop people leaving would, I accept, count as pretty much proof that the West was seen as much more successful than the East. But It may also have referred to later in the Cold War when West Germany was doing fine without much help from the US. The point remains that the USSR is no longer a communist state (arguably it never was) and it's still struggling. Maybe it's just taking its time to get going or maybe there's some more fundamental problem there. perhaps it's left over from the USSR but they didn't turn "communist" because the previous "capitalist" system had been an overwhelming success. in any event, comparing the extreme Right to a bizarre parody of the Left isn't going to help much.
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One big reason that designers of hydrophones like piezoelectric materials is that they are even stiffer than water; they really can shove water out of the way. Enjoy your optimism; perhaps you can take video and put it on youtube. You are quite likely to succeed for a simple reason. It's easy to get an amplifier that will dump a hundred Watts of power into a loudspeaker. And your ear will hear signals of the order of a pico watt per metre squared so (with a roughly 1cm ear hole) you can throw away 99.999,999,999,999,99% of the signal, and still hear it. (I may have lost track of the nines there, but I think you get the point). The signal you transmit is a million million million times bigger than the one you need to receive.
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Require method of purifying Tin from 3% Impurity of Silver
John Cuthber replied to yatendrao's topic in Chemistry
On exactly what planet does saying "it's true that steel and other metals are commonly melted during processing at temperatures much higher than those mentioned." would be an argument against being able to smelt iron. So that's just another straw man isn't it. -
Sugar cubes are a little denser than water, but if I dropped one into the ocean I wouldn't expect it to reach the sea bed.
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How do you reduce voltage and make a current last longer?
John Cuthber replied to MWresearch's topic in Engineering
Since an alternator generates AC it doesn't matter much which way you rotate it. And it isn't just modern windmills that always rotate in the same direction. Here's an image pinched from the web where you can see th esmall wheel at the back. Its job is to keep the main set of sails pointing into the wind. -
Do you think that baseless speculation should change what happens at CERN? Did you not think that people have looked into it (people who actually do understand it)? https://en.wikipedia.org/wiki/Safety_of_high-energy_particle_collision_experiments
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At those energies most (practically all) of the mass is relativistic so it hardly matters what the particle is made of. Most are apparently iron. I'd need to calculate the magnetic field at the surface of a nucleus before I could be sure if the earth's field or that of the ring at CERN would be significant. My hunch is that they are small.
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They are at 1,000,000 TeV and above. https://en.wikipedia.org/wiki/Ultra-high-energy_cosmic_ray This one https://en.wikipedia.org/wiki/Oh-My-God_particle was about 300,000,000 TEV. Nature is big.
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It's science; so it's true whether you (or I) sincerely hope it or not.
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It's mumbo jumbo. Do you realise that similar heavy ion collisions happen every day in the earth's atmosphere due to cosmic radiation? Why would CERN's work at Geneva do anything different?
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The area taken up isn't the only consideration. I suspect that the value of the land for the solar power plant is rather less than that for Drax.
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Well, showing that pi is transcendental is at least confirming something known to be true, though it was known not to be 22/7 since antiquity. Someone should get him some different magnets to play with.It's possible to magnetise three bars such that each will attract both of the others either way up.
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If the interaction was large then the earth and moon would be tidally locked, They are not: it is not. As you say " but it would take billions of years to move in by a large amount." Well the sun will go red giant before then so... Manchester would lose its reputation for rainy weather.
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Why? There are about 29.53... days in a lunar month so it's not as if the orbit of the moon is related to the rotation of the earth. if it rotated the other way why would it make much odds?
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The process of steam distillation is nothing to do with bumping.
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What would happen if the Earth's rotation was highly increased?
John Cuthber replied to Bruno da Silva's topic in Physics
It would depend on what the scriptwriter wanted. -
Whether or not that works will depend on the slopes of the vapour pressure/ temperature curves for eugenol and water. Good luck finding them. Did you somehow think the vacuum only reduced the boiling point of the water and left that of the eugenol the same? My guess is that teh vacuum distillation would work. It would be possible to separate them with a decent fractionating column. Freezing out the water should work and it's low-tech. The oil should gather at the bottom of the flask. There's the issue of freezing water in glass flasks to worry about. Transfer the liquid to a suitable plastic bottle first Solvent extraction into a volatile solvent then re distillation would probably be the best bet. With a bit of care you could strip non-phenolic materials out during the extraction too.
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What would happen if the Earth's core was highly damaged?
John Cuthber replied to Bruno da Silva's topic in Physics
Just exactly how do you "damage" a zillion tons of white hot metal? -
Not my field, but I understand that there's evidence that it's fit for human consumption. Joking aside- that means it's not strictly a food hygiene issue. Gross perhaps, but not infectious or toxic.
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OK, so I had a look. This "When any man hath a running issue out of his flesh, because of his issue he is unclean." in an age where women did all the cooking isn't and can not be about food hygiene. ditto all the bits from 1 through 13 There's quite a lot of nonsense that ends "and be unclean until the even." which is absurd- the arrival of evening does not magically alter anything. Then there's a lot of stuff essentially about periods and semen. Plenty of opportunity for "ugh factors" but not actually a great risk to food Seriously- you think this "And if any man's seed of copulation go out from him, then he shall wash all his flesh in water, and be unclean until the even." is about food? Remind me not to go to your place for a meal. And there's no sensible way to see this as food hygiene either "And on the eighth day she shall take unto her two turtles, or two young pigeons, and bring them unto the priest, to the door of the tabernacle of the congregation. 30 And the priest shall offer the one for a sin offering, and the other for a burnt offering; and the priest shall make an atonement for her before the LORD for the issue of her uncleanness.". Did you actually read chapter 15 in the reference you cited, and, if so, were you paying attention?
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" Quote That is an invalid assumption. If your assumption were true, then Americans would also be extinct. " That was exactly my point. The assumption must be false. So, since the assumption that eating-pork-is-bad for you must be false, it can't be the reason for the exclusion of pork from the diet.