Science & Mathematics - 24 November 2007

2007-11-24 10:20:23 · 1 answers · asked by niki_0723 1 in Chemistry

When making a motor/transformer, does it matter if you cross the wires while winding the magnet wire? For example, can you wind the wire up and then wind it back down or would this cancel out the magnetism?

2007-11-24 10:18:40 · 5 answers · asked by techtonick.com 2 in Engineering

2x^3+8x^2+8x

2x^4-32

x^2+16

2007-11-24 10:18:35 · 4 answers · asked by underlove 2 in Mathematics

For example :-
Do buffalo purposely seek revenge on lion cub, and do lion purposely seek revenge on buffalo calf...because of a loss in the past for both? Are both and other animals capable of feelings of revenge?

2007-11-24 10:17:37 · 10 answers · asked by Gary88 1 in Zoology

2007-11-24 10:17:10 · 8 answers · asked by Jonathan O 1 in Astronomy & Space

do sunlight or like a regular home light say, in your kitchen have stronger uv ray?


this is for my science fair.

2007-11-24 10:16:00 · 3 answers · asked by :] 1 in Physics

I know that the brain is dead even if the heart is beating, but can the brain survive for a few minutes after the heart stops?

2007-11-24 10:14:21 · 6 answers · asked by jussie 2 in Medicine

2007-11-24 10:14:10 · 9 answers · asked by caldeira32 1 in Medicine

I can't figure it out....
Jessica has 16 dimes and quarters. Whitney has twice as many dimes and 1/3 as many quarters as Jessica has. If they both have the same amount of money, what coins does each have?

2007-11-24 10:13:26 · 4 answers · asked by daniella26 2 in Mathematics

is there such thing as a green element or stone being radioactive?

lol just curious

2007-11-24 10:10:06 · 2 answers · asked by Retard 1 in Earth Sciences & Geology

can you convert thjis to polar form

-3sqrt(7)-sqrt(21)i

2007-11-24 10:09:55 · 2 answers · asked by Anonymous in Mathematics

Using probability generating functions, find

P(X+Y=n) if X and Y are independent poisson distibutions with parameters a and b respectively.

Hence find P(X=k | X + Y = n) and E(X=k | X + Y = n)

2007-11-24 10:07:16 · 2 answers · asked by Anonymous in Mathematics

I am new to astronomy. I found Orion, now higher and to left of Beteguese there is a bright orange star/planet, i cannot see it twinkling. What is it?

2007-11-24 10:05:34 · 12 answers · asked by Anonymous in Astronomy & Space

Is anyone working on solving loss of tail rotor function from RPG's as seen in the movie "Black Hawk Down"? I've wondered this for many years, whether or not it's possible to design a system whereby tail rotor loss of function could be minimized by some kind of emergency jet propulsion in the tail section to produce the necessary thrust for safe control of the helicopter or by directing engine exhaust in a sidewards manner much like an engine reverse thruster to minimize or eliminate torque thrust. I'm also wondering why the military does not employ the NOTAR system in combat zone helicopters to mitigate being brought down by RPG's. Any helicopter engineers or pilots wish to comment?

2007-11-24 10:03:00 · 4 answers · asked by paul h 7 in Engineering

How are they affected? I mean anything... (the land, the people....) please say your source and give examples...

2007-11-24 10:02:42 · 2 answers · asked by Anonymous in Earth Sciences & Geology

2007-11-24 10:01:54 · 13 answers · asked by Jmastr2216 1 in Astronomy & Space

2007-11-24 09:58:57 · 9 answers · asked by Anonymous in Earth Sciences & Geology

2007-11-24 09:58:38 · 5 answers · asked by jmbigjay 1 in Weather

It is said that minnesota has 10,000. But I know that Michigan has over 11,000 lakes. Which states have more or the most?

2007-11-24 09:58:01 · 10 answers · asked by hpdancerfreak 1 in Geography

Specifically The Equation. I know it is 1/2 x Mass x Velocity but what does the 1/2 bit mean? Half Of What

2007-11-24 09:57:47 · 3 answers · asked by The Wonderful Me 4 in Physics

Assume a car is going 10 mph on an icy road. Does it really get better traction if driving in "Low" than in "Drive"? And if so, why? I don't understand the physics.

2007-11-24 09:57:16 · 2 answers · asked by Halbert 2 in Physics

If not mutations, what about other hazards to the health?

2007-11-24 09:55:54 · 6 answers · asked by mechmast 1 in Other - Science

Well, I've researched my textbooks and wikipedia.
I think I may know the general idea of what it is, but I want to be sure.
This is what I think....

-So I read that Acceleration is the rate of change, and a Newton is the force required to accelerate 1 kg of a substance by 1 meter per second squared (1 kg * m / s2).
So if I have my meaning of Acceleration correct, then if something had an acceleration of 5 Newtons, then for every second passed, 1 kg of that substance would speed up 5 meters per second more? So if it starts out at 10 m/s, then in 3 seconds it would be going at a speed of 25 m/s? Is that right?

And I know that a Joule is "the energy expended by a force of one newton moving an object one meter along the direction of the force." but can someone explain that to me more?
So...if a block of concrete that weighed 1 kg was sliding down a hill with a force of one newton (meaning it sped up 1 meter more per second?) then for every meter it slid, that would be 1 Joule?

2007-11-24 09:54:47 · 3 answers · asked by silvershadow0001 1 in Physics

2007-11-24 09:54:37 · 16 answers · asked by anthony h 1 in Botany

2007-11-24 09:53:53 · 3 answers · asked by marisol3697@sbcglobal.net 1 in Mathematics

2007-11-24 09:52:41 · 10 answers · asked by Anonymous in Chemistry

5.45 x 10 14
3.568 E -7
5.5 x 10 -7
2.99 x 10 8

2007-11-24 09:49:40 · 3 answers · asked by Anonymous in Chemistry

2007-11-24 09:46:52 · 6 answers · asked by Dāāĭǔ 1 in Other - Science

1/2b+1 + 1/b+1 > 8/15

2007-11-24 09:44:38 · 4 answers · asked by Anonymous in Mathematics

2007-11-24 09:39:23 · 5 answers · asked by acheebubha 1 in Mathematics