Science & Mathematics - 11 December 2006

2006-12-11 03:22:19 · 7 answers · asked by weqiiii 1 in Zoology

2006-12-11 03:22:08 · 9 answers · asked by silentknight64 3 in Astronomy & Space

2006-12-11 03:22:05 · 7 answers · asked by sarai m 1 in Earth Sciences & Geology

The outside integral has limits from y=0 to y=1. The inside integral goes from x=0 to x=squareroot(1-y^2). Inside the integral we have 9dxdy, so the equation is integrated with respect to x first, then y. After the inner integration, I have 9 * integral (0 to 1) of squareroot(1-y^2) dy. I found a formula in the back of my textbook that works for integrals of the form sauareroot(a^2 - u^2) du, where a is a constant (a=1 in my case). And my answer is 9 * (y/2 * squareroot(1-y^2) + 1/2 * sin-inverse(y)) evaluated from 0 to 1. It comes out to 9pi/4, but I think it's supposed to equal zero in the problem, so what did I do wrong? Thanks much!

2006-12-11 03:20:14 · 2 answers · asked by Anonymous in Mathematics

I earlier asked what the next number was....

1/2, 1, 3, 6, 12, 24, ?

....and a number of you seem to think its 48.

Indeed, 'scotty' was most scathing and said each number was a simple doubling of the number before it and you did not need to be Einstein to work this out. However, I would point out that 1 +1 does not equal 3...as least it did not when I was at school.

I had better give you another clue...

1/2, 1, 3, 6, 12, 24, ?, 120

2006-12-11 03:19:14 · 3 answers · asked by Anonymous in Mathematics

How long does they have to go to school how much money do they make each surgery

2006-12-11 03:17:47 · 7 answers · asked by Ty L 1 in Medicine

2006-12-11 03:17:00 · 20 answers · asked by weqiiii 1 in Chemistry

2006-12-11 03:15:24 · 6 answers · asked by SINU_999 1 in Astronomy & Space

And how important is the "phase difference" when you "add" 2 oscillations with the same direction and period ?

2006-12-11 03:12:33 · 5 answers · asked by Lulu 1 in Physics

I've read that a spinning ball, when it picks up velocity in air, encounters a free stream flow of air which acts in one direction, say left to right. Can someone explain from here how a ball, spinning in clockwise direction, causes a force to be constituted? I just want a clearer picture of this. I don't understand the explanation about the change in velocity, and then pressure, and then a net force up.

Since the ball spins clockwise, so the free stream flow over the top of the ball is assisted by the circular flow; the free stream flow below the ball is opposed by the circular flow.
The above is extracted from a source. So, i was thinking, since the velocity of air is lower below the ball and higher above the ball, (assuming its spinning in clockwise direction like how ur finger does when pointing to the screen) can i apply Bernoulli's Principle here? Where lower velocity means higher pressure and higher velocity means lower pressure, and so constitutes an upward force as well.

2006-12-11 03:11:48 · 1 answers · asked by luv_phy 3 in Physics

2006-12-11 03:10:02 · 4 answers · asked by wildbutterflychick 2 in Earth Sciences & Geology

organic biology

2006-12-11 03:09:06 · 4 answers · asked by sorida 1 in Biology

organic biology

2006-12-11 03:06:39 · 1 answers · asked by sorida 1 in Biology

If you were to put a powerful nuclear weapon down a coal mine, seal it off with thousands of tons of earth and concrete, then explode the weapon. When you reopened the mine would it be full of diamonds?

2006-12-11 03:05:29 · 4 answers · asked by David H 6 in Physics

organic biolgoy

2006-12-11 03:05:22 · 2 answers · asked by sorida 1 in Biology

2006-12-11 03:04:54 · 17 answers · asked by weqiiii 1 in Chemistry

What is the unit price of a dozen and a half eggs that cost $4.65?

2006-12-11 03:03:16 · 8 answers · asked by Anonymous in Mathematics

When bears were anesthetized, researchers measured the distance (in inches) around their chests and they weigher the bears (inpounds). Based on the results, does a bear's weight seem to be related to its chest size? Do the results change if the chest measurements are converted to feet? ( you need to determine r)

X Chest (in.), Y Weight (lb.) (X,Y) 26,90; 45,344; 54,416; 49,348; 41,262; 49,360; 44,332; 19,34

Is there a linear corielation? How strong? Positive or Negitive correlated? Predict the weight of a bear whose chest measures 30 in.?

2006-12-11 03:01:58 · 3 answers · asked by srt927 1 in Mathematics

2006-12-11 03:01:53 · 9 answers · asked by antonandrews100 1 in Mathematics

I need to find solved circle equation problems. I need an internet site where to get this examples.

2006-12-11 03:01:06 · 1 answers · asked by Anonymous in Mathematics

2006-12-11 02:59:48 · 5 answers · asked by Chris S 2 in Astronomy & Space

2006-12-11 02:59:09 · 16 answers · asked by Anonymous in Mathematics

Which of the following reactions can take place at a cathode?

a) Fe^+3 --> Fe^+2
b) Cu^+1 --> Cu^+2
c) H2 --> 2 H+
d) Ag --> Ag^+2

Please explain your answer. Thanks!

2006-12-11 02:58:19 · 4 answers · asked by katielou2010 1 in Chemistry

2006-12-11 02:58:11 · 3 answers · asked by laprincesa_4289 1 in Mathematics

2006-12-11 02:55:35 · 7 answers · asked by Em 6 in Biology

Which of the following describe a neutral solution?
a) a solution that is 1 x 10^-4 M in [H+]
b) a solution that is 1 x 10^-4 M in [OH-]
c) a solution that is 1 x 10^-7 M in [OH-]
d) a solution that is 1 x 10^-14 M in [H+]

Please explain your answer, thanks!

2006-12-11 02:53:58 · 2 answers · asked by katielou2010 1 in Chemistry

2006-12-11 02:52:51 · 10 answers · asked by sammnpm 1 in Physics

2006-12-11 02:51:14 · 11 answers · asked by sammnpm 1 in Physics

Oleic acid
Linoleic acid
Linolenic acid

2006-12-11 02:50:52 · 2 answers · asked by pratikbapi 1 in Medicine

My friend recently went to Vietnam. Knowing that I am prior military, he bought me a zippo lighter that was used during the Vietnam War/Conflict by an American.

I would like to return this zippo to the family of the soldier who it belong to. However, all of the information has been covered by a Vietnamese Symbol that was glued to the zippo.

I would like to know how I can remove the symbol from the zippo without ruining the zippo itself.

Can anybody help me with removing a metal symbol from a metal zippo? It appears to have been glued on.

Thanks!

2006-12-11 02:49:35 · 4 answers · asked by Drew P 4 in Chemistry