John Cuthber

You need to sort out the grammar here There's a difference between "do bad eggs smell sulfur" which is nonsense- sulphur doesn't have a nose- and "do bad eggs smell of sulfur". Also since sulphur is a non volatile solid, it doesn't smell. But a lot of its compounds do.

You seem to have the right approach. I haven't time at the moment to check the details.

That's a rather more subtle linguistic point than it looks. perhaps I should have written "Bad eggs smell of hydrogen sulphide."

Well, let's start with the good news. You are right about what they mean by 100%. The bad news is that there's not enough information to answer the question. But you can make a start on it (if there's more information in the question, you can probably answer it) How much SO2 reacts with 1 mole of NaOH? How SO2 much is there in 15cf at 30,000 ppm? and so on...

The point remains, the molecules in a gas are already traveling at roughly the (local) speed of sound. There simply isn't time for this to have much effect.

The cartoon (and let's remember- it is just a cartoon) refers to sea levels during the cretaceous period. This article says that's 170M higher than today http://news.mongabay.com/2008/0306-sea_levels.html And there are (as already pointed out) other estimates. 200 metres looks like a reasonable estimate to me- especially given the somewhat speculative nature of the issue. But I'd like to ask a few simple questions of those who worried bout the suggestion that it might not be the right figure. What percentage of the human race do you think lives between 0 and 60 metres above sea level and what percentage between 60 and 200 metres? Why are you worried about the future of one of those groups, but not the other? Isn't 60 metres enough of a disaster?

Before using mercury, can anyone please explain to me why the bottom contact can't just be a piece of metal?

Is this serious? The video shows that the changes in the pattern take place over several seconds. That's obviously far too slow to be relevant to engine combustion which happens in milliseconds.

No. Bad eggs smell of hydrogen sulphide.

The reducing agent is something like hydrogen, or even a free electron, from thermal dissociation of water. Flame chemistry does things that never happen in test tubes.

I don't think I would have passed the Turing test when I was 13.

Just for the record, while I am, by all accounts, remarkably conceited, I would think very carefully before coming to the conclusion that I know how to solve a problem like brain nutrition and protection, better than a zillion years of evolution. As I see it, among other advantages,the system of having two different fluids gives me a second line of defense, protecting my brain. As woody allen said "my brain: that's my second favourite organ"

Hickman head? http://www.labsource.com/Catalog/Item.aspx?ItemID=1461182

The people who make, sell and buy things like this http://en.wikipedia.org/wiki/Motor_soft_starter seem to think a fuse isn't up to the job. I happen to agree with them.

You seem unaware of many things, but surely you must understand that more rain will increase erosion? Will you please stop ignoring the excess deaths that occur in the UK in hot weather. These are real people who die. It is deeply insulting for you to ignore them.

You seem to have ignored the problem of starting current. Also, there are not many cases where a circuit powered by a 9 volt battery needs a fuse.

The advantage to a string is that, as long as it stays tight, you know where it will end up (though a bifilar suspension might be less affected by the wind.) If the pendulum bob is heavy it will not be badly affected by air resistance and will run through the shot. I'd advise keeping tout of the way and letting it come to a halt on its own.

I was taking a 45 degree angle as read. I have had a further silly idea. Imagine tying a golf ball to the end of a long string and tying the other end to a tree or something so the string is just long enough for the sball to reach the ground.. keeping the string taught, raise the ball to the level of the top of the tree so the string is horizontal + let it go. The ball will sing down and end up at ground level. In principle, the longer the string, the higher the velocity. (at least until air resistance gets in the way.) If you let this ball on a string hit a second ball at the bottom of the swing, all of the momentum and energy should be transferred to that ball and it will shoot off horizontally at a speed which is , at least in principle, only limited by the height of the tree. Put a 45 degree ramp in front of the second ball.

I don't have a source. To me it's obvious that if, even after decades of research into the effects of pollution on climate, it's because it isn't a big effect and it's swamped by others.

"I was using the one that the weatherman on the TV uses. The one almost everyone uses when they say it's humid." And, with just a little bit more effort, you could have used the right one. "The one which is relevant to discussions about the effect on humans of higher temperatures." They all are, but not in a simple way. In general, heating the air makes it difficult for people to lose excess heat. It does that directly (because it's hot) and also (indirectly) by raising the absolute humidity. So, making it hotter makes people feel hotter. Did you really need someone to explain that to you?

Why else would the effect be elusive? I'm not making that assumption. I'm assuming that pollution is ongoing. It is, so that's a fair assumption. In any event, what you "buy into" doesn't change things.

Put it in a test tube. Cool the tube in ice water. Cyclohexane will freeze. Hexane won't. Benzene will also freeze under those conditions.

If it's truly impossible to tell if it's true or false, then it can not matter whether you assume it's true or not. Any difference in outcome that arises from either (assuming that it is true) or (assuming that it is not true) is a potential way to prove that it's true or not. That's why science ignores unprovable things; they can't make a difference.

The initial current is zero. The rate at which that current can change is limited by the inductance and the voltage DI/Dt = V/L. If the time constant was zero, the initial current would have to be infinite (so the capacitor can gain a charge equal to CV in zero time. But that would mean that it had changed from zero to infinity in a very short time (ideally zero time). That would require either an infinite voltage or a zero inductance. Neither of those is going to happen. So the time constant can't be zero.

Just a thought, I'm pretty sure that the important factor is the velocity with which the ball is launched. That must be limited in some way, by the strength of the materials but I guess we can set that aside for the minute. How long a golf club can you use? If you stand on a block so you can use a longer club, will the increased radius mean that the club head ends up with a higher velocity? Will that lead to a longer flight? Also, you might want to read this http://h2g2.com/edited_entry/A36353126 I'm not sure it will work "sideways" but it might.