Science & Mathematics - 14 December 2007

i know that they cant but i dont know how to explain it in the right terms.. help

2007-12-14 06:36:03 · 10 answers · asked by Shelly Belly 1 in Mathematics

I am very interested in learning more about the multiverse theory. Did the big bang form our universe or did it form all universes? If it only formed our universe, then did it take as many big bangs as there are universes to form all of them?

2007-12-14 06:35:12 · 4 answers · asked by Anonymous in Astronomy & Space

We argued about this last night.
Can scientists really predict such events? And what if it was going to happen?

2007-12-14 06:34:50 · 6 answers · asked by Pie 3 in Astronomy & Space

can u refresh me up....
....pi/2
I= (x^2 +5) sinx dx
....0
can u show me the steps ..i already know the answer (pi+3) but i need the work

2007-12-14 06:34:24 · 6 answers · asked by jocuzzi 1 in Mathematics

2007-12-14 06:19:02 · 2 answers · asked by frisco 1 in Medicine

2007-12-14 06:13:46 · 7 answers · asked by newmommy 1 in Medicine

1. In a molecule in which the central atom exhibits sp3d2 hybrid orbitals, the electron pairs are directed toward the corners of:

(A) a tetrahedron
(B) a square-based pyramid
(C) a trigonal bipyramid
(D) a square
(E) an octahedron

Someone told me that it was E) an octahedron but I don't understand why. Can someone else why it's an octahedron and not any of the others? I'm confused...thanks so much.

2007-12-14 06:12:57 · 4 answers · asked by Anonymous in Chemistry

Comet Leaves Mystery Behind
What caused the comet’s explosion is not certain, but it may have collided with a small asteroid. Alternatively, an eruption of gas, ice and dust from within the heart of the comet may have blown up in the Sun’s heat, although the total amount of material ejected in such an explosion would probably be only about 1 per cent of the total mass of the comet. whereas the current explosion has more dust coming out as would happen if it was an asteroid. The latest report is a possible asteroid based on new findings by a past Nasa Astronomer Of The Week . Who works online for Space Environment Center who sent Don Yeomans of NASA's JPL comet /Asteroid team proof the sun did not activate the comet. Details as of who are not given at this point because of the many speculations that is was the sun based on the insane idea that astronomers think it underwent a similar explosion in November 1892.

2007-12-14 06:11:55 · 5 answers · asked by Planet22 2 in Astronomy & Space

2007-12-14 06:09:45 · 4 answers · asked by BIgDiVa C 1 in Mathematics

Thanks.

2007-12-14 06:09:44 · 3 answers · asked by chemquestions1 1 in Chemistry

2007-12-14 06:05:06 · 2 answers · asked by sam 1 in Chemistry

2007-12-14 06:03:53 · 1 answers · asked by sam 1 in Chemistry

Hi first of all i would like to apologize on my first post earlier.. I posted the wrong video of the UFO sightings.. :(

Heres the right video and long version of the video http://www.dailypopular.com/?cmd=Yt&p=1&q=florida-ufo&Code=-FeAK-q5Cok&nombre=Florida-UFO--Solid-Proof-Of-UFOS-On-film-UFOS-ARE-REAL

Let me know your thoughts guys coz im start to believe in this video footage...

2007-12-14 06:00:15 · 10 answers · asked by Dzuster 1 in Astronomy & Space

For a certain crystal X-ray diffraction showed the distance between the layer of atoms was 230 pm. If the crytal was held at an angle of 20.0o to the beam. What was the wavelength of the X-ray radiation in nm ?

2007-12-14 05:59:50 · 1 answers · asked by Liv 2 in Chemistry

If the composite function g o f: AarrowC is a surjection, then the function f:AarrowB is a surjection.

If the composite function g o f:AarrowC is a surjection, then the function g:BarrowC is a surjection.

2007-12-14 05:57:56 · 1 answers · asked by Mary 1 in Mathematics

Lets pretend I had a button that you can push. When you push the button, you are zapped into space as you are when you pushed it, but only for 3 seconds and then you get zapped back on Earth. My question, if you were zapped into space for 3 sec and then zapped back to Earth, would you be dead? Or can you live in space for just a few seconds without no effects.

2007-12-14 05:55:42 · 7 answers · asked by Joe C. 3 in Astronomy & Space

A norman window has the shape of a semicircle atop a rectangle so that the diameter of the semicircle is equal to the width of the rectangle.what is the area of the largest possible Norm,an window with a perimeter of 45 feet

2007-12-14 05:55:17 · 4 answers · asked by wudup 1 in Mathematics

2007-12-14 05:51:12 · 5 answers · asked by Anthony R 1 in Mathematics

I know I would die, but what would happen to my body...Would it be like Arnold Swchaneggar in Total Recall? What would happen to my body physically and would I be able to inhale? I knows theres no oxygen to breathe but would it be possible to inhale?

2007-12-14 05:48:52 · 10 answers · asked by Joe C. 3 in Astronomy & Space

Tips for viewing the Geminids in the West Coast (San Diego), e.g., what part of the sky to look, what time is the best for the Geminids display and, uhm, well, anything else you want to comment about this wonderful event.

2007-12-14 05:47:29 · 2 answers · asked by erik m 2 in Astronomy & Space

i been wondering about this question for a while.
i read in an article that it might take scientist 50 to 70 years
to make this possible.

2007-12-14 05:41:45 · 10 answers · asked by Anonymous in Astronomy & Space

2007-12-14 05:40:47 · 8 answers · asked by Bill W 【ツ】 6 in Zoology

If I were to toss a tennis ball straight up in the air on a fast moving subway car, why does it come right down to me and not fall to the back of the train? Is it that there is already forward momentum from the toss?

2007-12-14 05:39:55 · 10 answers · asked by Swede 2 in Physics

I live in a city and well, its been awhile since I have been in school, but does anyone know what the 3 phase power is that sits ontop of the powerpole? Whether its delta or Y, How much volts to ground and between each legs?

They use this power to energize the transformers that provide 240/120 to residential customers. Thanks for all the help.

2007-12-14 05:39:29 · 5 answers · asked by Marion C 3 in Engineering

√ 2 × √ 15 = how do I find this? its probly very easy but I could use some help

2007-12-14 05:36:31 · 5 answers · asked by Anonymous in Mathematics

upper left
lower left
lower right
upper right

2007-12-14 05:34:51 · 5 answers · asked by Anonymous in Chemistry

The following question came off the Mensa Puzzle Calendar for 2007.

"The square of the first number plus the second number equals 7. And the square of the second number plus the first number equals 11."

There's an obvious trivial solution, but there are also three other real solutions. I'm most interested in the 3 other solutions.

Answers must be provided in radical form, *not* as decimal approximations. Are you up to the challenge?

2007-12-14 05:34:19 · 8 answers · asked by Puzzling 7 in Mathematics

When 0.560 g of Na(s) reacts with excess F2(g) to form NaF(s), 13.8 kJ of heat is evolved at standard-state conditions. What is the standard enthalpy of formation (H°f) of NaF(s)?

Na(s) + F2(g)  NaF(s) (H°f) ??

A. 24.8 kJ/mol B. 570 kJ/mol C. 24.8 kJ/mol D. -570 kJ/mol

2007-12-14 05:32:31 · 1 answers · asked by Qatarya 1 in Chemistry

I roll a die twice.
E is the event that both rolls are even.
F is the event that the first roll is a four. (The elements of F are (4,1), (4,2), (4,3), etc.)
G is the event that the sum of the numbers on the dice is 7.
Which two events are mutually exclusive?
Pick one:
E and F
E and G
G and F
all of them?

2007-12-14 05:31:38 · 3 answers · asked by jewel7962002 1 in Mathematics

Hi, i'm having troubles starting with the following chem question:
Balc'd. equation: 4Au(s) + 8CN-(aq) + O2(g) + 2H2O (l) -> 4[Au(CN)2]-(aq) + 4OH-(aq)
How many liters of 0.22M NaCN solution would be needed to extract the gold from 1000kg of rock, if the rock is 0.063% gold by mass?

Any tips/suggestions would be great :)

2007-12-14 05:30:22 · 2 answers · asked by tomek 1 in Chemistry