Science & Mathematics - 31 July 2007

You could build a hypercube in 3D, so why is it in 4D?

I thought the fourth dimension was time.

2007-07-31 06:18:35 · 4 answers · asked by M.strom 3 in Physics

-2x^2-16x-21=0

#28

2007-07-31 06:17:06 · 3 answers · asked by Kristin R 2 in Mathematics

After a 20% price slash, a car sold for $31,200. What was the car's price before the price slash ?

2007-07-31 06:12:17 · 12 answers · asked by Brooke S 1 in Mathematics

Hi.
I have a phobia of gasoline --particularly the smell.

I can't drive by a gas station without getting into a panic.

My question is ->
Will I get brain damage if I smell the air when
going past a gas station ...
or if I breathe in exhaust fumes when walking down the street ...

Or would I have to dip a towel in gas
and sniff it?

2007-07-31 06:05:52 · 7 answers · asked by Anonymous in Medicine

Even if we find life somewhere else, we couldnt go there in our lifetime. Wouldnt all that money be better spent on helping all the more serious issues on our own planet. Imagine what $400 billion that we recently spent on a space exploration to mars would have done for the poor of our country or other important issues that affect lives of suffering people on this planet!

2007-07-31 05:58:08 · 14 answers · asked by Zap 2 in Astronomy & Space

2007-07-31 05:50:41 · 5 answers · asked by Sally Sue 1 in Medicine

is it possible for lightening to strike and not have any thunder after it

2007-07-31 05:46:19 · 9 answers · asked by cc 1 in Weather

2007-07-31 05:43:41 · 2 answers · asked by Anonymous in Zoology

Integrate x^3*e^(-2x) dx

2007-07-31 05:42:59 · 3 answers · asked by Anonymous in Mathematics

Should I do thiis by parts? or how do I go about this

2007-07-31 05:41:29 · 3 answers · asked by Anonymous in Mathematics

2007-07-31 05:36:37 · 2 answers · asked by Rafael 2 in Engineering

I'd like to determine the psi of a pump. All that is listed in the specs is the Horsepower, the Capacity (GPH), and the discharge head (in feet).

Is there some way to calculate the psi based on this info?

Thank you!

2007-07-31 05:31:36 · 10 answers · asked by 2007_Shelby_GT500 7 in Engineering

my calc broke

2007-07-31 05:27:43 · 3 answers · asked by Anonymous in Mathematics

http://www.myspace.com/theparanormalorbs...
we are looking for new places to look at can you help

2007-07-31 05:25:19 · 22 answers · asked by liam 2 in Paranormal Phenomena

Long ago -- probably in 1990 or 1991 -- I saw in a magazine a picture -- In that picture -- a feather and an apple were dropped at the same time in vacuum -- the picture is like this -- at top of the picture the feather and the apple are at the same position -- then probably after 5 sec another picture is taken and superimposed on the old one -- so now there are 2 feather/apple duo stacked on top of the other -- and -- like that there are many instances -- and at the last instance it was seen that feather is a bit closer to the ground than the apple -- some thing which means there is more force between the feather and the earth -- than -- between apple and the earth -- does einstiens general theory of relativity predict this -- I dont claim to have a theory which rivals GR -- I know nothing about GR -- while free I read some popular science books on physics -- just being curious -- the magazine where I saw the pic was "span" -- it is an american magazine published in India

2007-07-31 05:23:43 · 8 answers · asked by rajurenjitgrover 1 in Physics

2007-07-31 05:23:10 · 10 answers · asked by diana 1 in Medicine

2007-07-31 05:22:11 · 2 answers · asked by Anonymous in Zoology

2007-07-31 05:20:27 · 5 answers · asked by Anonymous in Astronomy & Space

I saw this question on a test and I am having a hard time answering it. There was a picture and I became totally confused. Please help?

2007-07-31 05:16:23 · 3 answers · asked by science_star 1 in Physics

1. simplify the expression:
(2/x-6)+4x

2. simplify the expression:
(c/b)-(c/abc)

3. simplify:
(23/3xy)-(1/3xy^5)

thank you!

2007-07-31 05:15:07 · 6 answers · asked by Anonymous in Mathematics

they are identities

2007-07-31 05:07:43 · 6 answers · asked by Anonymous in Mathematics

I don't need help solving it, but just understanding the context of what it's trying to ask:

Calculate the percent composition by mass of the following compounds that are important starting materials for synthethic polymers:

Ex: C3H4O2

So what is this question asking? Is it just finding what percentage an element accounts for in the whole compound?
So I would say something like Carbon accounts for 50% of the compound??

2007-07-31 05:04:09 · 7 answers · asked by Andrew 2 in Chemistry

let k(x) = x^2 and n(x) = (2x^2)/(x+1)

find k(n(x))

2007-07-31 05:00:50 · 3 answers · asked by Anonymous in Mathematics

The radius of a sphere is tripled, by what number is its volume multiplied?

2007-07-31 04:57:27 · 3 answers · asked by Jackie 1 in Mathematics

2007-07-31 04:57:01 · 2 answers · asked by Anonymous in Engineering

Can someone tell me two functions and what to enter for both to graph?

2007-07-31 04:56:13 · 1 answers · asked by littlesoutherner12 1 in Physics

and tell me how to type a "power" for best answer

2007-07-31 04:55:10 · 9 answers · asked by Anonymous in Mathematics

http://evolutionfacts.blogspot.com

2007-07-31 04:53:20 · 6 answers · asked by prffsrx 1 in Other - Science

2 + x^-1
------------
2 - x^-1

Simplify

2007-07-31 04:45:12 · 2 answers · asked by Anonymous in Mathematics

2007-07-31 04:44:35 · 4 answers · asked by NiCOLE :0) 1 in Weather