

John Cuthber
Resident Experts-
Posts
18407 -
Joined
-
Last visited
-
Days Won
52
Content Type
Profiles
Forums
Events
Everything posted by John Cuthber
-
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.
-
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
-
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.
-
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.
-
It's science; so it's true whether you (or I) sincerely hope it or not.
-
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?
-
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.
-
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.
-
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.
-
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?
-
The process of steam distillation is nothing to do with bumping.
-
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.
-
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.
-
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?
-
" 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.
-
No. it's to stop the air pushed out from the front of the speaker simply moving round to the back. You probably do care about that because it drops the efficiency to near zero for wavelengths smaller than the speaker With a 20 cm speaker the "sound" can get from the front to the back at about (1.5Km/sec) in something like 100 µseconds. So, only frequencies higher than about 10KHz will actually be radiated efficiently. Were you planning to broadcast to underwater dogs and bats? There's another issue. The speaker is designed to work in air. It's built to be strong and heavy enough that the speaker frame (magnet+ mountings etc) stay still and the (very light) air gets pushed around. However, under water it will be trying to move essentially the whole pool full of water (the water's practically incompressible so it cant squeeze it- it has to shove it out of the way). What will happen is that the speaker diaphragm will stay still and the rest of the speaker will move.
-
I didn't mean butane, I meant the petrol type stuff. It's not clear from the OP but My guess is that Elite Engineer steam distilled the stuff in the first place. If that's the case, then guess what will happen if you try to boil off the water.
-
The fuel used for cigarette lighters is a fairly good solvent for this sort of thing. A centrifuge isn't going to work unless there's enough eugenol that it's present as drops, rather than solution. Salting it out might work..
-
I suspect that some of his latest "not gaffes" rather lost him the women voters. Still, if he stands as an independent and splits the republican vote that suits me. The interesting bit will be if he holds the party to ransom by threatening to do so if they don't support him. re. " and now Overtone will correct me and say that it wouldn't be the first time " What's to correct? You said it.
-
Well, you seem to have slightly contradicted yourself but no matter. Since there are contemporary records it seems that they did hold broadly the opinions they said they did. (which means it's not setting the bar too high). The fact is we will never know what would have happened if they dropped the 2nd bomb on an uninhabited forest somewhere just to prove the point. One possibility is that it might have failed to go off and thus given our enemy a lot of data about the bomb. Another is that they might have gambled (correctly) that we only had two bombs and carried on fighting leading to further loss of life. or maybe- given a couple of weeks to realise just what they had already been hit with, they would have surrendered without the 2nd bomb ever being used. hindsight is 20 20.
-
In a very real sense, I wish you had two. If one group sets out heading 5 degrees east and the other 5.0001 degrees east, it isn't long before they lose sight of where west is.