Science & Mathematics - 9 November 2007

This question troubled Newton for many years. A little mass, "m," is a certain distance from the center of a globular cluster of masses and there is a certain force of gravity, due to the cluster of masses, on the little mass that pulls it toward the center of the cluster. Now consider the situation whereby neither the little mass nor the center of the cluster moves, but the cluster uniformly expands. As a result of this expansion some parts of the globular cluster are closer to "m" and some are farther from "m." After the expansion, the forces of gravity of the cluster on the little mass "m" will:

a) increase
b) decrease
c) remain unchanged

2007-11-09 13:34:51 · 5 answers · asked by ? 6 in Physics

please answer my questions
like what job would require this

2007-11-09 13:34:45 · 3 answers · asked by ♥♪ü 4 in Mathematics

2007-11-09 13:32:43 · 5 answers · asked by Anonymous in Mathematics

like in this ex:
what is the magnetism and # of unpaired electrons of B2?
what i got from the solution is it is paramagnetic and 3 but i dont know how

2007-11-09 13:32:26 · 1 answers · asked by sdt3 1 in Chemistry

Then how come in the Natural Cures book by Kevin Trudeau, he says not to use them.. ?

-He doesn't state why. He just says Don't Use Flourescent Lights...

If anyone knows why CFL (Compact Flourescent LightBulbs) are bad, or a harmful threat/risk, please let me know why
With soem backup info?

Thanks. [:

2007-11-09 13:31:30 · 6 answers · asked by pj! 3 in Astronomy & Space

A 50 kg trunk is pushed 6.6 m at constant speed up a 30° incline by a constant horizontal force. The coefficient of kinetic friction between the trunk and the incline is 0.22. a)Calculate the work done by the applied horizontal force. b)suppose the 50 kg trunk is pushed 6.6 m at constant speed up a 30° incline by a force along the plane. The coefficient of kinetic friction between the trunk and the incline is 0.22. Calculate the work done by the applied force. c)How much energy was dissipated by the frictional force acting on the trunk?

2007-11-09 13:30:40 · 1 answers · asked by wonderwoman 1 in Physics

When Jesus died on the cross. 30 AD, more likely 36 AD, possibly somewhere in between, it was said in the bible that the sky went dark for a few hours. Can you help me determine if there was a full eclipse in Jeruselem during this time? thanks!

2007-11-09 13:28:56 · 11 answers · asked by Anonymous in Astronomy & Space

ok, here's my physics problem, I have to do an assignment that involves finding resultant displacement, average velocity and average speed. There is one question where I have to solve BOTH algebraically and graphically.

The problem is, I'm not getting the same answer. I know that it's ok to be a bit off since the measurements for the graphical solution might not be exact, but I am way off. The two answers are completely different.

In the question, the given information is:
[delta] d1 = 125.75 m, 35 [degrees] E of N taking 14.50 secs
[delta] d2 = 345.0 m, 65 [degrees] W of S taking 55.35 secs

For my algebraic solution, my resultant displacement was 244.33 m (I'm not sure which angle I should calculate, so please help!)

For my graphical solution, my resultant displacement was 230 m (again, I dont know the angle and direction).

I'm thinking that my graphical solution is wrong because my triangle looks pretty bad. Any help in finding the resultant displacement would be nice and thx!!

2007-11-09 13:27:24 · 3 answers · asked by Kouji F 1 in Physics

2007-11-09 13:24:26 · 4 answers · asked by Zzz 1 in Engineering

the math problem is log5 1 and the answer the book gives is 0

Ack!! How did they get that

2007-11-09 13:22:48 · 1 answers · asked by B K 1 in Mathematics

2007-11-09 13:22:18 · 3 answers · asked by fm_aqua 1 in Medicine

2007-11-09 13:19:17 · 2 answers · asked by cjbass21 1 in Mathematics

1. Points D(-4, 6), E(5, 3), and F(3, -2) are the vertices of triangle DEF. Find the perimeter of the triangle.

2007-11-09 13:14:16 · 7 answers · asked by Anonymous in Mathematics

2007-11-09 13:13:04 · 2 answers · asked by fm_aqua 1 in Medicine

2007-11-09 13:08:34 · 7 answers · asked by C K 3 in Mathematics

Hi everyone. I am trying to think of a great title for a scientific paper I am writing on Giardiasis. Everything so far is too specific and I need something that encompasses the whole infection. Any ideas will be much appreciated :D Thanks in advance!

2007-11-09 13:08:14 · 3 answers · asked by Anonymous in Zoology

2007-11-09 13:04:08 · 11 answers · asked by Anonymous in Astronomy & Space

(a) Potassium metal burns in an atmosphere of chlorine gas.
(b) Strontium oxide is added to water.
(c) A fresh surface of lithium metal is exposed to oxygen gas.
(d) Sodium metal is reacted with molten sulfur.

2007-11-09 13:01:29 · 1 answers · asked by Circuiteer 1 in Chemistry

2007-11-09 13:01:16 · 6 answers · asked by Anonymous in Mathematics

(Type your answer using the format [Ar] 4s2 3d10 4p2 for [Ar]4s23d104p2.)

2007-11-09 12:58:32 · 2 answers · asked by Circuiteer 1 in Chemistry

What causes the marijuana buds to expand in your lungs?

2007-11-09 12:56:09 · 4 answers · asked by Anonymous in Botany

2007-11-09 12:52:11 · 9 answers · asked by cynthia c 2 in Astronomy & Space

I really would like to know the answer and if possible provided data that validates the answer.

2007-11-09 12:47:43 · 5 answers · asked by Sean O 1 in Weather

How long would it take to reach the closest star if our ship could accelerate at exactly 1G halfway and then reverse & decelerate at 1G? How long to the center of the galaxy?

2007-11-09 12:44:44 · 14 answers · asked by Rick H 1 in Astronomy & Space

...if I wanted to be near orca whales in their natural habitat (not sea world, hehe)? Are there any particularly active spots around the world?

2007-11-09 12:41:27 · 6 answers · asked by Acadia 3 in Zoology

This is something I've always wondered about but never bothered asking. Say you go to a home/car audio store to look at amplifiers. You have 2 amps, both made by the same company, both almost the same model, both of the same quality parts -- the only difference is the price and the wattage.

What exactly makes higher wattage amplifiers cost more money than lower wattage amplifiers? Do they just price higher wattage amps higher to make more money off of enthusiasts or are there technical reasons behind this?

I don't know too terribly much about electronics, but something seems a little fishy here. As far as I know, wattage is just determined by how much power is outputted, which to me is almost directly related to the power input, which is just amplified by other circuitry.

It just doesn't make sense to me why this would constitute a higher price.

Anyone know about this sort of stuff?

I hope I categorized this question right. Electrical engineering is what I was really after

2007-11-09 12:29:58 · 4 answers · asked by Adam 2 in Engineering

and no TV docs please!!!! if you could give the name and what they are famous for. Thanks!

2007-11-09 12:28:57 · 4 answers · asked by *City Gal* 3 in Medicine

2007-11-09 12:25:46 · 18 answers · asked by Anonymous in Parapsychology

2007-11-09 12:25:04 · 2 answers · asked by ? 1 in Mathematics

Okay so I have this REALLY mean teacher. And she always singles me out. She'll ask me a million questions and then make fun of me when I dont know the answers. Its rediculous. Shell make fun of how "stupid" I am and make rude blonde comments. I fricken hate it. My parents wont do anything about it until I talk to her. But she will never take me seriously. I know it. What do I do?!

2007-11-09 12:24:14 · 8 answers · asked by Anonymous in Other - Science