Science & Mathematics - 15 December 2006

a bus takes 12 hours to travel the same distance that an airplane travels in 1.5 hours. The average speed of the airplane is 120 km per hour faster than five times the average speed of the bus. What is the average speed of the bus?

2006-12-15 05:49:27 · 8 answers · asked by Starlight 1 in Mathematics

you know how it looks blue under your skin?
if your arms was in an airproof box, with no oxygen in it...
and you cut yourself

what color would the blood be????

blue or red?

2006-12-15 05:46:59 · 8 answers · asked by Linda M 3 in Medicine

Does the cold invade the warmer space or visa-versa? Ignoring the fact that the door itself will cause air flow, when you open a door from a warm room into a cold one, which way does the air move?

2006-12-15 05:45:31 · 4 answers · asked by Anonymous in Weather

and how reliable are those predictions? How often do stars observable from our planet go supernova?

2006-12-15 05:45:25 · 6 answers · asked by tomcatdsl 1 in Astronomy & Space

2006-12-15 05:44:41 · 4 answers · asked by 2.71828182845904 5 in Medicine

2006-12-15 05:41:01 · 4 answers · asked by akandaa 2 in Geography

Then using the numbers 0,1,2,3,4,5,6,7,8,9 only once make the difference the smallest possible positive interger? The sum seems like it should be 97531+86420=183,951 but I am not sure. The difference seems like it should be 97531-86420=11,111 but I am not sure. Are these correct solutions.

2006-12-15 05:38:52 · 4 answers · asked by meow0911 1 in Mathematics

2006-12-15 05:35:42 · 10 answers · asked by tbird17 1 in Chemistry

2006-12-15 05:33:26 · 9 answers · asked by ram kumar 2 in Mathematics

I believe in Evolution. However, in order to attempt to prove me wrong someone sent me an email that said the following:

"On the subject of evolution, scientific evidence proves that that is
not possible. The sun, for example,
40 million years ago would have been big enough to touch the earth.
Also, the earth is slowing in
rotation, so that means that it was going faster. What kind of life
do you think could have lived on a
planet that didn't have gravity to compensate for the rotation 40
million years ago? Everything on the
planet would have been flung off the earth. Those are just two facts
against evolution."

Are these facts true, or are they false and madeup. Please site your sources.

2006-12-15 05:31:02 · 14 answers · asked by Byron A 3 in Astronomy & Space

Find the possible eigenvalues, eigenvectors and if possible find an invertible matrix P such that P^-1AP=D.

A= 2 -1
-4 -1

The polynomial is x^2 - x - 6 and the eigen values are -2 and 3. The eigenvectors are [1 4]^t and [-1 1]^t where ^t means the transpose of these matrices. I just need help wit the invertible matrix part.. and explanation how to do it would be great.

2006-12-15 05:30:24 · 4 answers · asked by Anonymous in Mathematics

2006-12-15 05:30:20 · 11 answers · asked by skinnypetite7172 1 in Botany

Can anybody explain the tests to be carried out and how this would be done prior to working on an appliance, eg earth continuity, correct polarity with appliance ON and OFF. testing correct voltage etc.
I have placed the probes of a multimeter on the live and neutral pins at the plug of an hairdryer but the reading stays at 1. Should I not get a resistance. It was set at 200 OHMS.
Dont worrry Im not tampering, its part of a course Im doing but curious to know more.
Thank you.

2006-12-15 05:27:40 · 7 answers · asked by anthony r 1 in Engineering

2006-12-15 05:26:27 · 4 answers · asked by Anonymous in Earth Sciences & Geology

Einstein's equation, translated into English reads, to me:

Energy is created when matter is accelerated to the speed of light squared, or, energy is matter at the square of the spped of light.

A key point of relativity is that C is the absolute speed of a particle in our universe. (Experimentally, I assume that this means that no particle has ever been measured at higher than C. Of course, since the particles in the measuring device top out at C that would be difficult.) However, C squared. Can't happen. A science teacher once said that it was sufficient to us e=mv, or e=mc. So why an equation that contradicts the most fundamental point?

2006-12-15 05:25:29 · 3 answers · asked by Anonymous in Astronomy & Space

why not purple?

2006-12-15 05:22:31 · 9 answers · asked by negress07 2 in Zoology

2006-12-15 05:22:25 · 8 answers · asked by umashankar 1 in Mathematics

2006-12-15 05:21:58 · 14 answers · asked by Anonymous in Geography

2006-12-15 05:21:04 · 6 answers · asked by 504Tweety 1 in Chemistry

7, 7, 5, 4, 1, 9, 8, 8, 8, 5, 2

2006-12-15 05:19:22 · 2 answers · asked by reesespieces60202 2 in Mathematics

you can do one or more dont worry i am not cheating just tell me what number you are oding

1. x(2-x)-x(3-X) solve it

2.write an expression for this, seven divided by the sum of x and 5

3. solve for y... 14.2y-12.5=6.4y-13.7

4. solve... -(-80)|-7|

5. solve for x... 5x+14-2x=9-(4x+2)

6. What is 57000/160 rounded to the nearest hundred

thanks you can do as many as you want

2006-12-15 05:18:53 · 8 answers · asked by Anonymous in Mathematics

2006-12-15 05:18:31 · 9 answers · asked by Pierce J 1 in Earth Sciences & Geology

2006-12-15 05:17:25 · 9 answers · asked by horsewoman_77 1 in Earth Sciences & Geology

Every day lately around 4:00 about 100,000 crows fly over my house all heading in the same direction. Are these the same crows everyday or are they different crows heading to a meeting ground? And it always seems like it happens this time of year.
If anyone could explain why they do this, that would be great.

2006-12-15 05:15:56 · 3 answers · asked by Scout 2 in Zoology

1. Reduce: 8 / 2x - 4

2. Reduce: x + 7 / x2 - 49

3. Convert 60 miles per hour to feet per second.

4. Solve: 7/x = 8/3

5. Simplify: x3/5 * x2/3

6. combine terms: 5^2 - 3^2 (^ squareroot)

7. Solve for x:
| x 2 |
| 6 2x| = 10x

8. Solve the system: cramer rule
x + y + z = 5
x - y + z = -2
2x + y - z = 4

2006-12-15 05:13:42 · 13 answers · asked by wil46yang 2 in Mathematics

2006-12-15 05:10:15 · 4 answers · asked by michelle d 1 in Mathematics

2006-12-15 05:04:23 · 5 answers · asked by Its Me 1 in Physics

2006-12-15 05:03:16 · 3 answers · asked by kuzhali S 1 in Other - Science

2006-12-15 05:01:57 · 3 answers · asked by kyle b 1 in Astronomy & Space

hi all...

Hi i have placed this question know on what basis the timings are fixed if they follow a standard out there....hope to get the right answer

thanks all

2006-12-15 05:01:34 · 1 answers · asked by Deepak- GLOBAL WARMING 2 in Astronomy & Space