Science & Mathematics - 26 July 2007

If you have the number of protons and neutrons how do find the number of electrons?

Thanks.

2007-07-26 11:26:54 · 3 answers · asked by Anonymous in Chemistry

2007-07-26 11:24:34 · 2 answers · asked by Anonymous in Physics

ok, vacuum energy thought of to be the direct result of dark energy being present in our universe has been veryfied (as far as i remember) by putting to metal plates at a small distance to each other, measuring the diference of such fluctuations between both plates and the outside, as a force.
(was it called casimir-effect ?)

Now i think .. does this ammount vary under gravitational influence of some sort, and if so can you give any numbers to it ?
anyone tried the experiment on the ISS for example ?

any numbers at all to get an imagination about how strong the effect is ?

2007-07-26 11:23:40 · 3 answers · asked by blondnirvana 5 in Astronomy & Space

2007-07-26 11:16:35 · 1 answers · asked by Anonymous in Physics

x^2 -8x +12

2007-07-26 11:16:03 · 5 answers · asked by Anonymous in Mathematics

What if you were out in space, but you suddenly died. Would your body continue to roam in space for eternity since nothing in space would cause the body to decay? What else would happen? Remember you're way out in space, millions of miles from a planet.

2007-07-26 11:13:18 · 27 answers · asked by andy c 3 in Astronomy & Space

What are you opinions on John Titor?
When the John Titor "timetravel" situation arose several years ago, why didn't the owner/webmaster of the sites that he posted on trace his IP address to see where he was posting from?

2007-07-26 11:11:18 · 2 answers · asked by cardinalfanusa 3 in Physics

2007-07-26 11:08:43 · 8 answers · asked by cykomiko 2 in Weather

this theory had been rejected from many scientists, but my opinion is that there is some kind of possibility, but i would have a more specific answer, if i completed the advance physics, because i'm still learning the tip of the Ice Berg physics,and once again NO FORMULAS

2007-07-26 11:07:00 · 3 answers · asked by Anonymous in Physics

I bought a pitcher plant a few weeks ago and it was at first totally green, but now it's turning slightly red and veiny. Is this normal? Also, there doesn't seem to be much fluid in the bottom of the plant, but then again it is a small plant

2007-07-26 11:00:03 · 4 answers · asked by Anonymous in Botany

Let X be a metric space with distance function d. Is there any condition that ensures that the closures of open balls of X are the closed balls of same center and radius? In R^n with the euclidean metric this is always true. But if we take R^n with the discrete metric, d(x,y) = 1 if x<>y and d(x,y) = 0 if x = y, then this is not true. For example, the open ball centered at 0 and with radius 1 is {0} and its closure is {0}. But the closed ball centered at 0 and with radius 1 is the whole R.

So, I'd like to know if there's a condition, necessary, sufficient or both, that ensures the desired condition in a general metric space.

Thank you

2007-07-26 10:59:22 · 4 answers · asked by Adrian 1 in Mathematics

On the episode of South Park called: "Quest For Ratings", it said that if you drink an overdose of cough syrup you hallucinate and see things and its kinda like drugs. Is that true? And has anybody done it before? If so, does it work?
Thx! :)

2007-07-26 10:56:56 · 4 answers · asked by Anonymous in Medicine

wouldn't closing the Thames Barrier make the upstream river burst out of its banks?

2007-07-26 10:56:34 · 2 answers · asked by lilou b 1 in Earth Sciences & Geology

2007-07-26 10:56:12 · 1 answers · asked by Amanda S 2 in Zoology

determine
a) time taken by projectile to hit a point C at ground level
b) the range X of projectile as measured from the base of the cliff
c) At the instant just before the projectile hits the point C, find the horizontal and vertical components of its velocity
d) Find its final velocity ( magnitude and direction)

2007-07-26 10:55:42 · 2 answers · asked by Anonymous in Physics

6y^2 + 17y + 12

2007-07-26 10:41:54 · 4 answers · asked by Anonymous in Mathematics

2007-07-26 10:39:30 · 7 answers · asked by dan 1 in Mathematics

Know that getting a 1 in any single throws is 1/6. Getting a 1 both times in 2 throws is 1/6 x 1/6 = 1/36. However, what is the probability of getting a 1 at least once in two throws? Seems too high to just say 1/6 + 1/6 = 1/3?

2007-07-26 10:39:25 · 6 answers · asked by daf 1 in Mathematics

I am going for an MRI scan and i have gold teeth will it be a problem? because high-powered magnetic fields are involved, patients cannot have this scan if they have any metal in their body (such as heart pace-makers) and some people like me have gold teeth, does this count as metal or is gold a different type of metal. i am worried and feel too stupid to ask the doctors before i go for the scan. does anyone have any advice?

2007-07-26 10:34:45 · 12 answers · asked by CHRIS J 2 in Medicine

15 y^2 + 4 y -4

2007-07-26 10:31:21 · 5 answers · asked by Anonymous in Mathematics

y(x)=(9x^2 + 4x)^1/3

If u= 9x^2+4x

du/dx= 18x+4 and dy/dx= (1/3)U^-2/3=1/3(9x^2+4x)^(-2/3)

is the final answer 6x + (4/3)(9x^2 + 4x)^(-2/3)?

2007-07-26 10:30:30 · 4 answers · asked by finding.4ever 1 in Mathematics

Could it be that just as everything we know is made up of atoms, that the nucleus of an atom, could be made up of even tinier particles which are to it, as atoms are to us?
And so ad infinitum.

2007-07-26 10:29:52 · 10 answers · asked by Sprinkle 5 in Physics

3w^2 +8w -16

2007-07-26 10:25:08 · 4 answers · asked by Anonymous in Mathematics

2007-07-26 10:20:54 · 2 answers · asked by brainy not !!!!!!!! 1 in Chemistry

Simplify the expression.
( y + 5) ( y - 8 ) / ( y - 8 ) ( y + 9 )

y + 5 / y + 9

y + 8 / y + 1

y - 5 / y - 9

2y - 8 / 2y + 1

2007-07-26 10:20:21 · 5 answers · asked by Anonymous in Mathematics

2007-07-26 10:17:21 · 2 answers · asked by brainy not !!!!!!!! 1 in Chemistry

and the USA largest cities by area (km2) in the urban zone, no all the city area. Please try to understand me, I'm talking about the area of the urban zone (Buildings, houses, streets...) no about the rural zone that is included in the city's area.

2007-07-26 10:16:06 · 4 answers · asked by Ad_finem_temporum 2 in Geography

Multiply. Simplify if possible.

z ^3 multiplied by 4 / 20z 2z^2

z / 10

1 / 10z

1 / 10

z^3 / 10z^2

2007-07-26 10:12:24 · 7 answers · asked by Anonymous in Mathematics

did aliens come to earth and change the genetic order of apes with theirs to produce humans that would explain the missing link from ape to man and adam and eve

2007-07-26 10:10:26 · 25 answers · asked by GARY I 3 in Earth Sciences & Geology

What is the IUPAC name of Asprine?

2007-07-26 10:09:28 · 5 answers · asked by maggamdi 1 in Chemistry