Science & Mathematics - 12 December 2007

The eVolution car uses compressed gas to run a 2 cylinder car. It claims to be emission free. But it’s not as the gas is compressed with electricity, the emission is transferred to the Thermal Plant that produces the electricity to compress the gas.

So I was looking for a benign chemical reaction that can produce a gas in an enclosed cylinder so that it can be used as a compressed gas to power a vehicle. A Gas Pressure of 4500 psi , preferably a Gas that is not noxious or environmentally detrimental. Fermentation produces Co2 which is again a greenhouse gas. How about the gas in Air Bags? Do you know of any chemical reaction that would be viable for this purpose.

http://news.bbc.co.uk/1/hi/world/africa/988265.stm

http://auto.howstuffworks.com/air-car1.htm

Thank you for your time

2007-12-12 07:07:16 · 5 answers · asked by Anonymous in Chemistry

2007-12-12 07:07:02 · 2 answers · asked by kanabbasi 1 in Physics

Im doin a report on this and cant find and info or help on the web. What Im looking for is how does magnetism relate to atoms. Please Help

2007-12-12 07:04:53 · 2 answers · asked by mike g 1 in Other - Science

A blank card must have been hand delivered to my home, as it didn't have my address on. However, it did have my (first) name on it. There was nothing on the card other than the following letter/number combinations:

52 / 28.7 N
1 / 53.9 W

I have no idea what they mean, but as it was hand delivered and had my name on it, it'd be nice to know! No idea who posted it either, as it was on my mat first thing in the morning, way before the postman arrived.

Any ideas?

Cheers

Rich, Birmingham UK

2007-12-12 07:03:55 · 22 answers · asked by Anonymous in Paranormal Phenomena

2007-12-12 07:00:52 · 2 answers · asked by tazzerz 1 in Mathematics

I am writing a paper on chemical reactions and wanted to know who discovered valence shells/valence electrons? Which scientist and in what year?
Thanks! :)

2007-12-12 07:00:34 · 3 answers · asked by Jane 1 in Chemistry

Let (r_n) be an enumeration of the rationals and let (a_n) be a sequence of positive numbers. For each n =1,2,3...define I_n as the open interval (r_n - a_n , r_n + a_n) and let I = Union (n = 1, oo) I_n. It's clear that I is dense in R.

Now, consider the series Sum (n=1, oo) a_n. We have 2 possibilities:

(1) If the series converges, then, according to the sub-additivity of the measure (Lebesgue measure, in this case), we have m(I) <= Sum (n=1, oo) m(I_n) = Sum (n=1, oo) (2 a_n) = 2Sum (n=1, oo) a_n < oo. Since m(R) = oo, it follows I is not all of R, but one of its proper subsets.

(2) If, on the other hand, Sum (n=1, oo) a_n diverges, then the argument given in (1) leads to no conclusion, all we get is the obvious inequality m(I) <= oo. In this case, is it possible that I is still a proper subset of R or will we always have I = R?

If lim inf a_n >0, then I = R, but if If lim inf a_n = 0, I'm not sure.

Thank you for any suggestion.

2007-12-12 06:58:23 · 2 answers · asked by Steiner 7 in Mathematics

2007-12-12 06:57:30 · 3 answers · asked by william5000forever 2 in Mathematics

2007-12-12 06:55:48 · 3 answers · asked by expartethis 1 in Engineering

Calculate the equilibrium concentrations of L, M, and N if a system containing, initially, 2 mol of L and 2 mol of M dissolved in 24 dm3 of a suitable solvent, is allowed to reach equilibrium at STP.

2007-12-12 06:53:43 · 1 answers · asked by Jerome D 1 in Chemistry

so it creates the right graph. Is it: ln (x) / -2?

2007-12-12 06:52:13 · 6 answers · asked by Anonymous in Mathematics

Six days ago my 4GB uniquely shaped black flash drive vanished. As my laptop has a rather small hard drive I had stored TONS of work on the flash drive, basically the past year of my life! As I know how important it is, I always try to put it back on my desk but I've looked all over and under my desk and it isn't there! I've nearly turned the whole house upside down looking for it. I honestly have no recollection of what I did with the flash drive when I took it out of the only USB port on my laptop. My last resort is digging through last week's garbage and I dread the thought of that! I must find it!

2007-12-12 06:50:17 · 13 answers · asked by Anonymous in Paranormal Phenomena

A painter is going to use a board for support during a painting job. The board has a weight of 175N and the painter has a weight of 815N. THe left end of the board is supported by a sawhorse and the right end by a lightweight rope attached to an overhead bracket. The overall length of the board is 3.60m. When the painter stands at a distance of 2.70m from the left end of the board, calculate the tension on the rope. Express the result in N.

2007-12-12 06:50:08 · 3 answers · asked by jukeb0xqirl 2 in Physics

im in 11th grade chem 1 honors and our teacher never shows up to class to help, what is titrate and what is methyl orange? will i be able to find these? and what how would we test .1N HCL?

2007-12-12 06:47:25 · 1 answers · asked by Gello 1 in Chemistry

Consider a Diesel cycle that starts with air temperature 300 K. The air may be treated as an ideal gas. If the temperature at the very end of isobaric expansion is 950 K, and gas compression ratio is 21, what is the efficiency ( in %) of this cycle? Give your answer with one decimal point accuracy

2007-12-12 06:44:23 · 1 answers · asked by Anonymous in Physics

Do you have a clue? My neighbor says that Bethlehem is in the desert and there was never snow there. I researched the historical maps, but I can't tell exactly where it was in Israel.

2007-12-12 06:37:26 · 13 answers · asked by Patricia B 1 in Weather

2007-12-12 06:36:52 · 4 answers · asked by danasha 1 in Chemistry

2007-12-12 06:26:54 · 8 answers · asked by Jerome D 1 in Chemistry

2007-12-12 06:26:43 · 1 answers · asked by CLAUDYNA C 1 in Chemistry

Because a function never assigns two output values to a single input value, its graph never has
two different points with the same ___-coordinate.

I think its y-coordinate
Is that correct?

2007-12-12 06:25:05 · 2 answers · asked by Anonymous in Mathematics

2007-12-12 06:25:03 · 3 answers · asked by CLAUDYNA C 1 in Chemistry

The best answer gets 20 points.

2007-12-12 06:23:39 · 3 answers · asked by Anonymous in Earth Sciences & Geology

Use the discriminate to determine the number of solutions for the equation 9x2 + 6x = -1.
1
2
3
none

2007-12-12 06:23:39 · 4 answers · asked by Anonymous in Mathematics

2007-12-12 06:20:14 · 10 answers · asked by bigboomer321 2 in Geography

0.9(x+80)+0.1x=97

2007-12-12 06:19:55 · 2 answers · asked by higherlovetx 5 in Mathematics

This may be niave of me but if we see all of the bodies of space as they were in the past ( the amount of time relative to the distance) then if we were to find evidence of a planet similar to earth in each way and planets such as this came to an end then could it not be possible that by the time we reach or even find out out about this planet in reality it could no longer exist. If this is blatantly wrong excuse me I am an ignorant 15 yr old

2007-12-12 06:17:42 · 7 answers · asked by Anonymous in Astronomy & Space

IF WATER IS H2O HOW COME WHEN WATER THAT IS CALLED DEAD CAN STILL BE SEEN AND HAS NOT CHANGED INTO HYDROGEN GAS WHEN IS SUPPOSED TO BE OXYGEN DEPLETED

2007-12-12 06:15:12 · 5 answers · asked by gaza 1 in Chemistry

2007-12-12 06:11:15 · 2 answers · asked by Anonymous in Astronomy & Space

2007-12-12 06:10:17 · 3 answers · asked by Anonymous in Astronomy & Space

2007-12-12 06:08:56 · 5 answers · asked by Daniel P 2 in Chemistry