Science & Mathematics - 8 November 2006

In looking up the history of the apollo program they make numerous references to the earths "terminator" as a visual reference for navigation in space. ANy idea what a terminator is?

2006-11-08 05:51:12 · 4 answers · asked by Jonny B 5 in Astronomy & Space

2006-11-08 05:50:13 · 8 answers · asked by momoftwins1986 1 in Mathematics

5 point

2006-11-08 05:49:33 · 5 answers · asked by Pooh H 1 in Astronomy & Space

2006-11-08 05:47:04 · 12 answers · asked by Chris M 2 in Mathematics

2006-11-08 05:47:01 · 6 answers · asked by Anonymous in Astronomy & Space

I have an ethylene stream with a lot of trace impurities in it. For all of them except ammonia I can use a Gas Chromatograph with a FID (Flame Ionization Detector). In the case of ammonia a FID will not work. What type of detector would be best suited for ammonia (5-0.1 ppmv range). I also looked at a NPD (Nitrogen Phosphorus Detector) but it seems to only be good for nitrogen containing organic compounds. Any help (and sources) would be appreciated.

2006-11-08 05:45:52 · 4 answers · asked by ence 2 in Chemistry

2006-11-08 05:43:53 · 28 answers · asked by Anonymous in Zoology

2006-11-08 05:41:45 · 33 answers · asked by Anonymous in Mathematics

what came first either

coordinate geomatry
or
simultanous equations
or
were they designed totally different?
help pleASE

2006-11-08 05:41:01 · 1 answers · asked by Anonymous in Physics

2006-11-08 05:40:22 · 3 answers · asked by aaron g 1 in Physics

is it solved by substituting or by parts?
[Arcsin(x) mean sin inverse of ( x) ]

2006-11-08 05:38:54 · 3 answers · asked by fm02 2 in Mathematics

2006-11-08 05:37:27 · 21 answers · asked by Anonymous in Mathematics

It is well known that continuity doesn't imply differentiability. Which means that it is possible to have functions that are continuous everywhere and differentiable nowhere. I know only of one such example, given to us by Weierstrass as the sum as n goes from zero to infinity of (B^n)*Sin((A^n)*pi*x) where A and B can be any numbers that satisfy 01+(3pi/2).

The reason this is continuous because you are simply adding continuous functions but it is not differentiable because it becomes very jaggedy.

The question is, do you know of any other examples where the function is continuous everywhere but differentiable nowhere?

2006-11-08 05:34:46 · 3 answers · asked by The Prince 6 in Mathematics

I need some help:
What I'm dealing with are tubes with a 3 cm diameter. I need a way to calculate how efficient the placement of these tubes within certain diameter circular areas would be.

I think the best way would be for all the tubes to be tangent to their 'neighbors' and thus create a honeycomb-hexagon shape within the circular area.

As examples (there are several more calculations that I need to do), I need to find the number of the 3 cm tubes that I can fit together within a 20 cm-diameter circular area. Also, I'd like to do sort of a backwards calculation from that and find how much circular area 30 of the tubes would occupy. As I've said, there are plenty more to do, but if someone would explain to me a procedure for working the above calculations, I can do the rest on my own.

Finally, I thought it might be helpful to visualize, so I looked for circle packing graph paper, but I couldnt find any. If you find a link to that it would be very helpful.

THANKS!

2006-11-08 05:32:52 · 2 answers · asked by Anonymous in Mathematics

What is the simplest way to synchronize two air cylinders operating through the same 4 way valve to cause them to move at the same speed?

2006-11-08 05:28:22 · 2 answers · asked by deniver2003 4 in Engineering

Can somebody please explain to me what the heck is the difference between continuity and uniform continuity?

2006-11-08 05:28:14 · 4 answers · asked by The Prince 6 in Mathematics

2006-11-08 05:27:54 · 2 answers · asked by santos sm 1 in Medicine

I don't even know what the First Law of Motion is..
Is it the same as the First Newton's Law?

2006-11-08 05:26:32 · 5 answers · asked by heyheyhey 2 in Physics

2006-11-08 05:24:38 · 3 answers · asked by ambita2004 1 in Chemistry

I want to specialize in neurology.

2006-11-08 05:24:00 · 7 answers · asked by fcukster2 1 in Medicine

I need springs that are about an inch or two in length and are fairly thin in diameter. Something that I can squeeze together with my hand, so nothing that requires a lot of force to compress.

2006-11-08 05:22:28 · 2 answers · asked by John - 1 in Engineering

2006-11-08 05:21:39 · 5 answers · asked by SIMON P 1 in Zoology

2006-11-08 05:20:14 · 3 answers · asked by fm02 2 in Mathematics

i am trying to conceive and am having difficulties the next thing is to find out the day that i was born how far the moon was and at the time i was born and it has to be precise...

2006-11-08 05:19:54 · 2 answers · asked by monica m 1 in Astronomy & Space

2006-11-08 05:19:09 · 6 answers · asked by vgautham_91 2 in Physics

is there a live video of it ? somewhere that will show the whole thing?

2006-11-08 05:18:21 · 4 answers · asked by munkimonika 3 in Astronomy & Space

2006-11-08 05:14:11 · 13 answers · asked by samsdvs 1 in Mathematics

i read that there were online telescope cameras...but how do i find and veiw them

2006-11-08 05:14:03 · 1 answers · asked by dystortion . 1 in Astronomy & Space

2006-11-08 05:09:01 · 8 answers · asked by Alien Anjali 2 in Earth Sciences & Geology

Wood

Air

Steel

Water

I really need help I read through the selection I had and it said nothing, I think the answer is Water but I am not sure.

2006-11-08 05:07:46 · 8 answers · asked by Anonymous in Earth Sciences & Geology