John Cuthber

How overcomplicated an answer can you get? The force neede to bring it to a halt is the force gravity exerts on it (10 Lbf) multiplied by the ratio of the distance it accelerated to the distance over which it's brought to a halt. It falls 156 inches If the spring on the scales brings it to rest in, for example, half an inch the force is 10 X156/0.5 =3120 Lbf If it came to rest over just 0.1 of an inch the force would be 5 times greater; 1560Lbf Without knowing more about the scales it's impossible to know, but you can get a reasonable estimate this way.

They used to make NaOH from Ca(OH)2 and Na2CO3. I guess Mg(OH)2 would work too

No, not really.

If you can tell me where this "creator" came from then I will forsake the Universe. Incidentally, there is evidence for the big bang, but there's none for God.

At some level, isn't all behaviour pleasure seeking?

Just a thought; if pornography is a crime, who is the victim? I know that some people in that industry are exploited, but that's the same in other industries. I suspect that it's particularly prone to exploitation because it's on the border of legality.

Nitric acid reacts with hydrochloric so the bit about HNO3 + NaCl is wrong. "BaOH + NaCl => NaOH + BaCl" is wrong because you have the wrong formula for barium hydroxide. Also, you have cited a reference to volatile acids. You can get a similar effect with volatile bases, but NaOH isn't normally considered volatile as it boils at nearly 1400C. Also at least some metal oxides react with water to form acids so the bit about "Oxides of metals are called basic anhydrides because many of them react with water to form bases." is, at best an inaccurate generalisation.

"How do you know it's not all just a dream?" I don't. If (somehow) I knew it were, would I act differently?

The universe is astonishing enough without having to add God to it.

"I think people should be allowed to admit ignorance on taxes. I really do. All these criminals from the past should not have been put away for tax evasion, because they could have easily claimed ignorance." So you think it's better to let criminals go free than to jail them. An interesting position. Since you are posting here about tax you know it exists and that there are circumstances where you should pay it- particularly where you receive money from another party. OK, you just admitted to knowing about the tax; you now need to find out how much (if any) you need to pay. Talking about what you learned in high school has nothing to do with it; people learn things in the rest of life.

"I know that NaOH is produced commertially by putting Na2O into water, by the following equation: Na2O (s) + H2O (l) => 2NaOH" I'm willing to bet that it isn't. The rest of the post is largely rubbish too.

"Artificial organs are ok if you don't plan on doing large amounts of activity or bursts of activity often." For many people, artificial organs are OK if you don't want to die.

It is slightly soluble, a couple of grams per litre IIRC.

Whatever the reason, most of the Western world doesn't need another excuse to eat more.

If you knew the structure then, in principle, you can calculate things like density. In practice I don't think this has even been done successfully for water, never mind anything bigger

http://en.wikipedia.org/wiki/Artificial_lung http://en.wikipedia.org/wiki/Artificial_heart http://en.wikipedia.org/wiki/Artificial_kidney http://en.wikipedia.org/wiki/Artificial_pancreas Artificial organs look like a safe bet.

"Its a solution of ammonia in water." No, it's not. On warming a solution of ammonium nitrate with calcium hydroxide I would expect to get ammonia, but with reasonable concentrations of ammonia solution and calcium nitrate I would expect a precipitate of calcium hydroxide. It's certainly an equilibrium reactions so it could go either way depending on the conditions.

I heard, that overall food consumption rises during Ramadan. That's the last thing that most of the Western world needs. My recollection from somewhere or other in the past is backed up by this "Ramadan is a month of simplicity and fasting but it is well known that in the Muslim World food consumption increases. " from here. http://www.saudigazette.com.sa/index.cfm?method=home.regcon&contentID=2009080445706 Among other places.

Ortyou can use glass or teflon which don't react. Or platinum; you only need a thin layer to coat the stuff with.

That joke would be better if British Petroleum still existed, or if you gave BP the right name. This one is much better.

For H2O, NaCl or CH4, with a lot of computing power, you might be able to get a reasonable approximation to those properties. For a formula like C2H6O you couldn't because you wouldn't know which isomer you had.

Draw a million dollars and try to spend it. You will soon find out that it's not real.

From wiki "A major contributor to this article appears to have a close connection with its subject. It may require cleanup to comply with Wikipedia's content policies, particularly neutral point of view. Please discuss further on the talk page."

Calcium hydroxide isn't very soluble; they should react. (Technically NH4OH doesn't exist)

I think the usual plan is to grow the algae in floating tanks. That gets round most of the problems.