Science & Mathematics - 8 December 2006

With the recent news that there might have recently been water on Mars, people are wondering if that means there is/has been life there, but why does water have to exist for life to exist. Couldn't life on another planet have developed in a manner much different from our own?

2006-12-08 07:07:29 · 11 answers · asked by jcresnick 5 in Biology

2006-12-08 07:05:40 · 9 answers · asked by guineapiglover 1 in Weather

2006-12-08 07:03:05 · 16 answers · asked by Syed A 1 in Other - Science

In reality, DNA Fingerprinting works very well for correctly identifying criminals. There is, however, one exception to this statement. Which of the following describes that exception?



1. when the criminal is an identical twin

2. when the criminal is not the same sex as the victim

3. when the criminal does not share the same ethnic characteristics as the victim

4. when the criminal did not eat the same food as the victim

2006-12-08 07:02:11 · 5 answers · asked by aris1903 2 in Biology

since its undefined when x = 2, can you apply l'hopitals rule and the limit is 5/4?
also for x approaches 0 for e^x-1-x/ sin[x], is it eventually 0 after you apply the rule? thanks people

2006-12-08 07:01:16 · 6 answers · asked by Anonymous in Mathematics

And if so, what did you do about it, and what can i do about it??

2006-12-08 06:59:05 · 5 answers · asked by Elias 1 in Medicine

leopards etc. I know that there are Ligers and Tigons, etc but haven't these cats been artificially inseminated..?

Just wondering as I'm watching a wildlife show on BBC 1 now about cheetahs and lions

2006-12-08 06:57:54 · 11 answers · asked by triptipper 3 in Zoology

"NASA's plans for returning people to the moon -- an objective called for by President Bush in 2004 -- includes establishing a permanent outpost that would be used to prepare for a manned trip to Mars" - CNN
The coming asteroid is going to pass through Earth's gravitational key-hole in 2029, and impact the Earth seven years later. Is it possible that world's scientist's have determined that stopping the asteroid is wishful thinking, and maybe after doing a risk asessment have determined that building a moon colony to shelter key individuals is more plausable. Maybe they are related, maybe not - but it does seem suspicious. Considering how hard and difficult it is to do these calculations, if they had determined it was dangerous, would they tell us?

http://www.cnn.com/2006/TECH/space/12/04/moon.base/index.html
http://space.newscientist.com/article/dn8245

2006-12-08 06:57:12 · 7 answers · asked by Anonymous in Astronomy & Space

2006-12-08 06:56:03 · 1 answers · asked by dean c 1 in Engineering

If yes, then why is it taught as fact? If No, Please provide the definitive proofs.

2006-12-08 06:55:42 · 13 answers · asked by True101 4 in Other - Science

i hate these darn related rates Q's, ive tried many attempts but i still cant get it, its a previous final, and the answer is either 8, .008,0.8, 2.4, 5.4, 38.4
thanks

2006-12-08 06:54:23 · 2 answers · asked by Anonymous in Mathematics

2006-12-08 06:54:11 · 6 answers · asked by flower 1 in Astronomy & Space

2006-12-08 06:54:07 · 6 answers · asked by Anonymous in Zoology

If the mother is 0+ and the father is a+ chances of having a 0- child is what?

2006-12-08 06:52:40 · 3 answers · asked by brenda l 1 in Biology

does the carbon dioxide from the atmosphere fully dissolve in the ocean or is some taken in by plants.

2006-12-08 06:51:16 · 5 answers · asked by myts 1 in Chemistry

2006-12-08 06:50:20 · 19 answers · asked by momoftwins1986 1 in Mathematics

I think the yellow ones are tasty?

2006-12-08 06:44:58 · 26 answers · asked by Brevin 2 in Zoology

At as basic level, does the Theory of Relativity say that all matter in the universe is ultimately reduceable to raw energy? I'm no good at physics and have a hard time understanding alot of the explanations.

2006-12-08 06:43:02 · 8 answers · asked by Kurt 2 in Physics

2006-12-08 06:42:48 · 5 answers · asked by delahayelouise 1 in Mathematics

2006-12-08 06:42:02 · 1 answers · asked by Anonymous in Physics

A stone is dropped from the roof of a high building. A second stone is dropped 3.00 s later. How far apart are the stones when the second one has reached a speed of 14.0 m/s?

Basically, I found Vi, Vf, X, A, T for the first stone and for the second stone. For the second stone, I found out at what time it is that the 14m/s velocity is reached. From there, I used basic kinematics formulas and then subtracted the answers, but that also is wrong. can anyone help with equation

2006-12-08 06:40:23 · 8 answers · asked by tigerlilly 2 in Physics

Using geometric distribution p(n)=q^(n-1)p
with p=1/10
Calculate E(n^3)
If you can, please show some of the last steps.
Thank you very much.

2006-12-08 06:40:17 · 3 answers · asked by Vu 2 in Mathematics

2006-12-08 06:37:17 · 8 answers · asked by bobby b 1 in Physics

Biotech companies are patenting human genes making anyone doing research on those genes pay them hefty fees or stop their research. Over 1/5 of the genome has been patented! These are the genes responsible for many diseases we want cured!!

2006-12-08 06:37:06 · 5 answers · asked by geeketta 2 in Medicine

if two waves with equal amplitudes and wavelenghths travel through a medium in such a way that a particular particle of the medium is at the crest of one wave and at the trough of the other wave at the same time, what will happen to the particle?

2006-12-08 06:36:55 · 3 answers · asked by Anonymous in Physics

please answer q fast!

2006-12-08 06:35:36 · 7 answers · asked by Anonymous in Biology

Ok it seems that since I was a little kid I have been hopeless at Math! My dad and little brother have a real talent for it, but my mom, me, and my older brother are not big Math fans. However, neither are as bad as me.
Ever since I can remember, it has been A's in everything, and then a fat old B in Math to ruin it for me. Now I am in High School as a freshman and taking Algebra 1.
I have a 73 (probably lower now) in Math and I'm scared it'll go down even more. I try at Math but then I end up getting a, say, 70 in what I worked ard for and I feel like giving up.
Whenever I sit down to that Math homework or that big test, I ust cannot bring myself to study.
Let's say I know a test is a week away. I leave it all till the day before the test. Then I skim through the chapter and say, "Oh! I know this, this, this....." without actually trying the problems. They look so easy then!
But when the test arrives in front of me, I blank or choke. I forget EVERYTHING.

2006-12-08 06:30:51 · 17 answers · asked by [A] 2 in Mathematics

2006-12-08 06:29:34 · 2 answers · asked by Anonymous in Physics

a flying aeroplane experiences loads of forces.....thrust, drag, lift, and weight or gravity. i know that when a plane is cruising, thrust and drag cancel each other out and similarly, lift and weight cancel each other out because both pairs consist of equal and opposite forces.
however, i found out that when a plane is accelerating or decelerating, taking off or landing, it experiences some forces (either thrust, drag, lift, weight or all of them at the same time). I know this must be a very confusing question for people who know a lot about aeroplanes, but i am just a A level student, doing a presentation on fibreglass in which i do this calculation showing that fibreglass is a suitable material for using in the new Airbus A380. i don't have to go so much into the physics of flying aeroplanes so this much information is fine for me.
i calculated the pressure experienced by the plane by Force/Area, does the answer 3.06 kNewtons/m2 seem like a very small pressure on an airbus A380?

2006-12-08 06:28:02 · 4 answers · asked by amandac 3 in Physics

whats the meaning of "tight" here? it means "restricted" or "fixed"? (in math)

We use o-notation to denote an upper bound that is not asymptotically tight.

2006-12-08 06:26:08 · 5 answers · asked by Hossein R 1 in Mathematics