John Cuthber

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.

Using a fuse is a good idea. But this "because as the temp increases resistance increase which draws more current" is still wrong. As the motor gets hotter it will draw (slightly) less current. But, as the load on the motor increases and the speed decreases, the current will rise. You might need to protect the motor from the high currents that flow when the motor is stalled. However that runs you into a different problem- the motor is always "stalled" when you first start it. So, a fuse that would protect the motor from a long term over current, would blow every time you started the motor. It's complicated when you do this with big motors. With small motors and batteries it's not an issue- the internal resistance of the battery and the motor will limit the current as long as you don't use too high a voltage.

Even without any resistance, the circuit would have inductance and that would limit the rate at which the charge on the capacitor could change.

"Resistors in series simply add resistance to a circuit. The more resistance you have the more current required." Nope. Arguable, the more resistors you have, the more voltage you would require. "So if your concern is about providing to much power to the motor a resistor in series won't improve your situation. Yes it would. The difficulty is calculating the value of the resistor you need- especially since this depends on the current drawn my the motor and that, in turn, depends on the load. "That will prevent the motor from overheating because as the temp increases resistance increase which draws more current (amps" Nope, when it gets hot the resistance rises (slightly) and it draws slightly less current. But the resistance of a fuse is small and so it doesn't affect the current much until it gets hot enough to melt (the hint is in the name). Once it melts there's no longer a wire to carry the current. Why post nonsense? On a related note, Sensei, when you say "Without anything Ampere meter is showing 2.4 A." do you mean that you connected the meter directly to the battery without anything to limit the current? If so, you risked damaging the meter. You should never try to measure the current from a voltage source.

My best guess is that, for example, Christians designed their buildings differently in order to show that they (the Christians) were different. An architectural shibboleth as it were.

Write to the authors and ask for a copy. I always gave out free copies of papers I had published and I know many other authors do to. (or, to put it another way, you may already have access to the stuff you paid for- you just don't realise it so you are trying to change the system without understanding it. That sounds rather like climate change)

"Among all cloud-aerosol interactions, the invigoration effect is the most elusive" Because it is small, and largely overturned by the other effects. "a substantial part of this anthropogenic forcing over the oceans occurred at the beginning of the industrial era" So, it's not contributing to recent changes.

Nope, that's a relative humidity, not an absolute humidity. So, you are wrong about this too "So an increase of 1 degree would not mean an increase in humidity directly. In fact the opposite initially." "I only do basic science," No, you get basic science wrong. "but it's good to have somebody that does do those points don't you think?" No, not really, it means that someone has to waste time correcting you. If you didn't bother to post rubbish in the first place, it would be better all round.