Science & Mathematics - 31 December 2007

How have the location,shape,and size of landforms influenced human settlement and transportation?

2007-12-31 09:30:24 · 1 answers · asked by Anonymous in Earth Sciences & Geology

i ALWAYS have this word stuck in my head. I have no clue why or how I always think of it. It's just stuck in my head. Whenever I wake up, I think of myrisitic betaine. it's always on my mind. WHAT IS IT?

2007-12-31 09:28:18 · 1 answers · asked by Anonymous in Botany

Thanks in advance for the help. I got project on mercury and the element's like confusing me.
What is mercury's electron configuration?
Some sites have the configuration as this: [Xe] 4f14 5d10 6s2
and others as this: [Xe]6s24f145d10.
WHICH IS CORRECT? x_x;

2007-12-31 09:28:02 · 4 answers · asked by Anonymous in Chemistry

That was just today, last friday i saw it in my neighbors window just standing there, then i looked down to get my keys to run into my house and then it disappeared from the window. Then later i heard footsteps from my second floor when no one was home and i was 100% sure of that. The figure has appeared numerous times and it is really really freaking me out, but it hasn't made any movements to make me consider it dangerous. What should i do?

2007-12-31 09:22:10 · 12 answers · asked by Anonymous in Paranormal Phenomena

A student, sitting on a stool rotating at a rate of 40 RPM, holds masses in each hand. When his arms are extended, the total rotational inertia of the system is 6.5 kg·m2. He pulls his arms in close to his body, reducing the total rotational inertia to 3.5 kg·m2. If there are no external torques, what is the new rotational velocity of the system?

______RPM

2007-12-31 09:21:54 · 4 answers · asked by shamsan_415 1 in Physics

if (x-y)^2=y^2-xy then dy/dx=
a)(2x-y)/(2y-x)
b)(2x-y)/2x
c)(2x-y)/x
d)(2x+3y)/x
e)undefined

2007-12-31 09:21:42 · 5 answers · asked by Anonymous in Mathematics

did he ever actually say 'humans evolved from monkeys' or is that some thing misunderstood.
i need sources please.

2007-12-31 09:19:55 · 14 answers · asked by Anonymous in Biology

Let's say there is an object weighing about 910 kg. It falls from a distance of 30 cm. Assuming the only force acting on the object is gravity, what would the force of the 910 kg object be when it hits a concrete floor.

2007-12-31 09:19:13 · 6 answers · asked by hutchdawg85 2 in Physics

find all real zeros of g(x)=2x^3-x^2-10x+5

2007-12-31 09:19:11 · 4 answers · asked by Anonymous in Mathematics

A mass of 1.2 kg is located at the end of a very light and rigid rod 50 cm in length. The rod is rotating about an axis at its opposite end with a rotational velocity of 4 rad/s.

(a) What is the rotational inertia of the system?
______ kg·m2
(b) What is the angular momentum of the system?
_____ kg·m2/s

2007-12-31 09:18:21 · 2 answers · asked by shamsan_415 1 in Physics

but the isotope has 50 neutrons...why?

2007-12-31 09:18:08 · 3 answers · asked by Me<3JB 2 in Chemistry

as it gets dark 4-5hrs earlier in the winter, i wondered whether the grazing animals in the fields carry on as normal in the dark or just give up and go to sleep!

2007-12-31 09:16:57 · 12 answers · asked by Anonymous in Agriculture

Two m = 0.7 kg masses are located at either end of a 2.5 m long, very light and rigid rod as in the diagram. What is the rotational inertia of this system about an axis through the center of the rod?

______kg·m2

2007-12-31 09:16:48 · 1 answers · asked by shamsan_415 1 in Physics

2007-12-31 09:12:42 · 7 answers · asked by wazzupp_dude2009 1 in Mathematics

I think it has to do with binomial theorem - need pointing in the right direction. Cheers

2007-12-31 09:08:43 · 6 answers · asked by kevoatley 1 in Mathematics

Sorry i know its stupid, just saw the question on the TV and curious! lol, happy new year all, 10 points for best answer. Thank you!

2007-12-31 09:01:57 · 12 answers · asked by Anonymous in Physics

From the perspective of a photon is the "diamiter" of the universe zero?

come to think of it we theorize that the universe started as a singularity... but from the perspective of a photon... isn't it still one?
the effects of relativity should render the universes length 0, its mass infinite and time should have stopped.. once again from the perspective of the photon..

2007-12-31 09:00:30 · 2 answers · asked by Felsen 3 in Physics

2007-12-31 08:59:51 · 2 answers · asked by JORDAN N 1 in Physics

in certain town 45% of the people have black hair , 30%nhave brown eyes and 20% have both black hair and brown eyes . if a person is selected at random from the town, the probability that he has brown eyes and doesn't have black hair is
1- 0.25
2- 0.1
3- 0.2
4- 0.3

2007-12-31 08:59:17 · 8 answers · asked by jojo 1 in Mathematics

black hole or north star

2007-12-31 08:59:16 · 9 answers · asked by shadowcat 1 in Astronomy & Space

its snowing here! its tooo pretty!

Happy New Years! :DD

2007-12-31 08:56:32 · 26 answers · asked by mercedes♥ 6 in Weather

if cosmic strings exist would they be composed of matter or are they a defect in space time?
also has anybody calculated their mass per given length?
and is it possible for then to have an event horizon?
and one last question... wouldn't all cosmic strings be loops? seems is they weren't they would evaporate from the tips?

2007-12-31 08:54:55 · 3 answers · asked by Felsen 3 in Astronomy & Space

I know, depending upon body mass, fat percentage, blah blah blah, but in general, how much could one person take? Has anyone ever expired due to capsaicin overdose?

2007-12-31 08:53:13 · 3 answers · asked by Kalishnakov 3 in Medicine

is this not the process for culling out the plasma from blood for example?

2007-12-31 08:53:04 · 4 answers · asked by Anonymous in Chemistry

ANy one please help me

2007-12-31 08:52:39 · 12 answers · asked by Anonymous in Paranormal Phenomena

We're doing an elements project, I have to type about 3 pages about my element, which is oxygen. then I have to make a 4-6minute video, powerpoint presentation, etc. I'm thinking about the video, but I dont know what to do, I think it would be stupid, whats your advice?

2007-12-31 08:51:06 · 2 answers · asked by Aaron C 3 in Chemistry

Check this Y!A question, and answers given:

http://answers.yahoo.com/question/index;_ylt=AkFArk4L1x8uHPl5s8Gn5Sz4xQt.;_ylv=3?qid=20071231132048AAHdMVO

It's argued that steam has "higher disorder" than water, so is it reasonable to infer that, therefore, standing water will naturally turn into steam? No, please don't argue that entropy is energy, and it takes energy to produce more entropy.

2007-12-31 08:48:56 · 6 answers · asked by Scythian1950 7 in Physics

2007-12-31 08:48:06 · 10 answers · asked by gfalk99 2 in Physics

a brand name medication, and copays are high, so asked doctor for a generic med to lower cholesterol since no generic available for Vytorin. Pharmacy says there are some at certain pharmacies as cheap as $4.00 copay/month! Doctor says, "Vytorin is working fine. Either take it or go see a cholesterol specialist" rather than write a generic script to see if it would work as well as Vytorin, even though a specialist wasn't consulted before receiving samples of Vytorin to begin with. Is this doctor being bull-headed about insisting on a brand name medication? Is there any reason "why" he couldn't give a generic script and have the blood retested in two months to see if the results are similar?

2007-12-31 08:47:36 · 5 answers · asked by Susan 5 in Medicine

2007-12-31 08:47:05 · 5 answers · asked by Anonymous in Mathematics