John Cuthber

And if that dot is not in a direct straight line from the source and through the slit, then there's obviously diffraction happening. So we know that the single electron diffracts. So we know it's a wavelike thing.

The Earth's rotation slows slightly when I go upstairs and rises again when I come back down. But the point remains that apart from the tiny effect of lifting some mass- that of the turbine and tower- using a wind turbine won't stop the earth rotating. Building the tower makes a difference, using it doesn't. If the wind didn't hit the tower then it would be slowed down by drag against the earth anyway. The rotation of the rock we are stood on changes. The rotation of the atmosphere also changes. But the rotation of the whole earth- including the geosphere and atmosphere pretty nearly doesn't. There's a tiny effect because, when the earth is nearer the sun, it warms and the atmosphere expands. The reason you can't use the rotation of the earth as a much better clock is that you only measure the rotation of part of it. If you could include the air as well, the whole earth would keep much better time.

No. Not "tends to cancel" but "absolutely has to cancel". The Earth is pretty much isolated so the angular momentum is conserved. (Ignoring tidal coupling to the moon etc) Since the moment of inertia is also unchanged the rate of rotation can not change. Yes, the wind provides a torque on the turbine, but only because the planet provided a torque on the wind in the first place.

There is a fundamental difference between the dam and a wind turbine. The dam moves a huge mass slightly further from the centre of the Earth; this changes the moment of inertia of the earth and therefore affects the rate of rotation because the angular momentum is fixed. The wind turbine doesn't. So it won't affect the rotation rate.

Stagnant water is a great way to encourage rot.

Like whether your uncle loves your aunt.

In what circumstances?

Unless you don't. The distinction between white and colourless is a bit unclear (if you forgive the pun). Resins used in varnish making are classified by their colour. The clearest (and thus the most expensive are called "water white". By the way, the word "albumen" comes from the Latin "albus" meaning "white".

It might breach this or indeed. My solution would probably stop me being weightless.

I presume that is considered cheating.

The chemical and microbiological specifications for tap water are generally more stringent than for bottled water.

Among other things, it could be describes as Mt Putin's dream come true.

Actually, those processes are (by the laws of thermodynamics) driven by a net reduction in organisation in the universe. It's true that trees grow, but it's also true (and a necessary part of evolution) that trees die. The expectation is that the universe will end up cold dull and empty. Your problem is only looking at yourself and the things near, and like, you. We may be getting more complex; so is life. But the universe isn't.

Long ago, at school I really pissed off the metalwork teacher. He had just finished explaining to the class about pickling copper after annealing it. You wash it in 10% sulphuric acid to remove the oxide film. They also pointed out that you had to use the special brass tongs because the acid would damage the (usual) steel ones. And, of course, he made a big song and dance about being careful with the acid. It undermined his authority when i just took stuff out of the bath with my hands and rinsed it under the tap. Dilute sulphuric acid does attack normal human skin, but slowly. Washing your hands in it is stupid bravado (and yes, that applies to me doing it when I was a school kid) but it doesn't imply any superhero skills. I doubt I ever got through a gallon of coffee in a day, but when I was a student I was getting through half a dozen caffeine tablets with my breakfast. Lethal doses of caffeine taken rapidly- are of the order of 5 grams. A cup of coffee is of the order of 0.1 grams. So, 50 cups of coffee at once would kill you . But a gallon over the course of a day is just an expensive (and unhealthy) choice of drinks. One obvious effect would be an extra gallon of piss every day. That's rather a lot. Enough, for example, to wash out a lot of any medical drugs you took before they had time to work. So the idea that it takes 4 times as much medicine to have an effect isn't a miracle either. There's nothing here to investigate.

In what way?

"What is the best political direction?" Neither- if you go too far.

Most of the people in the UK didn't vote for him or his party.

I once got asked to analyse the stuff found on the inside of a burst gas cylinder. They were trying to work out what had happened. There had been a witness- very very briefly- but he wasn't telling us anything anymore. (re)filling high pressure cylinders isn't as easy as people thing. It's also often illegal. This is not the sort of thing to do with "string and sealing wax" as the phrase goes https://www.spiedigitallibrary.org/conference-proceedings-of-spie/10309/1030908/Whatever-happened-to-the-string-and-sealing-wax/10.1117/12.2283713.short?SSO=1

I think they value it; they just don't recognise it. To be fair, they have seen few examples.

It says a lot that nobody mentioned "honesty" as a desirable trait yet.

Watch this space. https://hydeploy.co.uk/faqs/what-is-hydeploy/

Which bit don't you understand? This https://en.wikipedia.org/wiki/Nernst_equation which says the voltage depends on the pressure, or do you not understand the idea that you can store gas at constant pressure in something like this? https://en.wikipedia.org/wiki/Gas_holder Since the gas pressure never changes, the gas is never compressed, no work is done compressing it. That's why the voltage is higher.

He pointed out that it's impractical. "Liquid hydrogen must be contained at incredibly high pressure or maintained at very low temperatures by complex cryogenic systems. " As far as I can tell, only space rockets use LH2 as a transport fuel- and even they sometimes shy away from it. I don't know of any serious project that is looking at LH2 as an energy storage medium . There are two reasons. 1 it's hard. 2 It's inefficient- you waste a lot of energy cooling and heating it. The thread is about an new trick in the process of making hydrogen; what you do with it after that is a separate issue. Incidentally, If you generate the gas electrolytically, the answer is "none". You don't need to do work compressing it; the reaction will still work at higher pressure but needs a slightly higher voltage. Hydrogen generators exist, so they are clearly "reasonable"

Grown-ups read all the words

Nobody said you did. But you did raise the equally irrelevant liquid hydrogen.