Science & Mathematics - 11 November 2007

2007-11-11 23:58:55 · 1 answers · asked by zeeshan k 1 in Earth Sciences & Geology

2007-11-11 23:51:01 · 3 answers · asked by tyson88dy 1 in Biology

Please note the sun was to the left of it, here's the link:
http://www.realsproduct.info/

2007-11-11 23:47:21 · 9 answers · asked by John v 3 in Astronomy & Space

A circular disk of radius 2.0 m rotates, starting from rest with a constant angular acceleration of 20.0 rad/s². What is the tangential acceleration of a point on the edge of the disk at the instant that its angular speed is 1.0 rev/s?

Can anyone show me how this problem is done? I have a feeling I am making it far more complicated than it should be. Thanks to anyone who can help!

2007-11-11 23:42:08 · 1 answers · asked by doubtful 2 in Physics

when the north star is found, how easy is it to follow. can it be used sucessfully on short distances or is it more effective long range. any info will be helpful even if off question topic.

2007-11-11 23:41:57 · 8 answers · asked by Anonymous in Astronomy & Space

Help us to resolve the argument please

2007-11-11 23:36:01 · 6 answers · asked by anna d 2 in Chemistry

can anyone recommend me a good telescope for a 14+ year old?? I'm currently excited about astronomy and i just want a cheap(or not so) telescope that can see Saturns rings for example..

2007-11-11 23:23:54 · 9 answers · asked by predatordin 2 in Astronomy & Space

2007-11-11 23:18:56 · 2 answers · asked by Katniss 2 in Physics

should deals with creationism,evolution,genetics

2007-11-11 23:18:07 · 4 answers · asked by Ailyn F 1 in Biology

2007-11-11 23:11:53 · 13 answers · asked by DivCW 2 in Astronomy & Space

Wikipedia states the following:

"The compression stroke is the second of four stages in an otto cycle or diesel cycle internal combustion engine.

In this stage, the mixture of air and petroleum is "compressed" to the top of the cylinder by the piston until it is either ignited by a spark plug in an Otto engine"

What I really want to know is, how does the "compression" occurs? I mean, it can't just "compress", there must be some sort of mechanism or source of energy to instigate the "compression". How does it occur?

2007-11-11 23:09:42 · 4 answers · asked by Anonymous in Engineering

Can fish see in the dark? Do they hit the walls of aquariums? Do they bump into coral reefs?

Thank you :]

2007-11-11 23:04:34 · 5 answers · asked by Hannah C 2 in Zoology

The launching mechanism of a toy gun consists of a spring of unknown spring constant, as shown in Figure P5.33a. If its spring is compressed a distance of 0.160 m and the gun fired vertically as shown, the gun can launch a 23.0 g projectile to a maximum height of 24.0 m above the starting point of the projectile.

(a) Neglecting all resistive forces, determine the spring constant.
N/m
(b) Neglecting all resistive forces, determine the speed of the projectile as it moves through the equilibrium position of the spring (where x = 0), as shown in Figure 5.33b.
m/s

2007-11-11 22:42:16 · 3 answers · asked by Anonymous in Physics

2007-11-11 22:36:20 · 3 answers · asked by raphael s 1 in Astronomy & Space

2007-11-11 22:35:29 · 6 answers · asked by Anonymous in Zoology

2007-11-11 22:33:06 · 2 answers · asked by Drey 2 in Mathematics

What are the main things one has to know?

2007-11-11 22:30:50 · 6 answers · asked by ? 4 in Astronomy & Space

2007-11-11 22:25:31 · 2 answers · asked by Dana D 1 in Medicine

2007-11-11 22:22:22 · 4 answers · asked by Sajes 1 in Biology

what is the difference between direct and indirect greenhouse gases and why? give examples of each.

thank you so much for all those who help.

2007-11-11 22:08:52 · 5 answers · asked by Aakash 1 in Earth Sciences & Geology

I'd like to know them because I'd like to create attacks and techniques based on them.

2007-11-11 21:56:45 · 1 answers · asked by Sonic the Hedgehog 2 in Zoology

2007-11-11 21:55:18 · 11 answers · asked by Anonymous in Astronomy & Space

2007-11-11 21:53:41 · 13 answers · asked by ? 4 in Agriculture

2007-11-11 21:46:55 · 17 answers · asked by ? 4 in Agriculture

2007-11-11 21:34:23 · 22 answers · asked by Anonymous in Astronomy & Space

why is 1/i = -i, I don't understand how it's -i

can someone explain to me why 1/i = -i

thanks

2007-11-11 21:30:21 · 4 answers · asked by Anonymous in Mathematics

its easy to memorize, the problem with memorization is that it usually stays in your head for about a week or so, and then its gone. I find that if I understand why something is, if I understand the concept, if I am able to visualize it I can remember it for a long time, perhaps forever. I am having trouble visualizing and understanding changes of variables in multivariable calculus, can someone please help me visualize it?

2007-11-11 21:22:57 · 5 answers · asked by Anonymous in Mathematics

1) Eyes
2) Tongue
3) Nose
4) Ears
5) Eyes

it's for my Biology homework.........

2007-11-11 21:05:45 · 2 answers · asked by Anonymous in Biology

i don't know whether i should report it to the police or just dismiss it as possibly an animal.it lasted for about 15 mins. and i didn't hear it anymore.the sound was coming from a field near where we were sitting.it sent chills up my spine.i live in alabama and we do have bobcats and panthers in our area.but on the other hand i it sounded like a woman or child screaming for thier life.what should i do?

2007-11-11 21:03:17 · 7 answers · asked by crybabysharon 1 in Zoology

need help now plz!!!!!!!!!!!!!!!!!!!!

2007-11-11 20:29:50 · 3 answers · asked by Mel P 1 in Botany