Science & Mathematics - 14 December 2007

x to the power of -1/2

what does this mean

2007-12-14 23:57:28 · 4 answers · asked by Jim 1 in Mathematics

I have to write an essay about speed of light and i have to prove either that the speed of light actually isnt constant, or that it is constant and time travel is possible. But i dont really get what time travel has anything to do with it. also i really dont get speed of light in general. why is it constant?

2007-12-14 23:48:35 · 10 answers · asked by jbdrummergirl93 2 in Physics

Electrolysis of HCl (hydrochloric acid) with steel electrodes. What do the anode and cathod produce?

2007-12-14 23:46:55 · 3 answers · asked by Anonymous in Chemistry

This is all hypathetical and will be interesting to find an answer,

If You was able to sit on the beam of light from a spot light when it first starts out and ride that beam as it travels into outerspace and then someone shuts the light off would you keep going on the begining of the light that is traveling or would you just stop traveling?? The point is would the light that is already traveling keep going after the light was shut off?

2007-12-14 23:46:12 · 19 answers · asked by SPACEGUY 7 in Astronomy & Space

2007-12-14 23:39:55 · 3 answers · asked by Anonymous in Chemistry

Will the Allen Telescope Array be used for other science besides SETI?What are the advantages of having an array,is it more powerfull and does it look deeper into space?

2007-12-14 23:32:36 · 4 answers · asked by rich 1 in Astronomy & Space

(in simplest form)

NOTE: If you simplify f(x) = (x^2-4)/(x-2) first, and THEN take the derivative, the first derivative is 1

2007-12-14 23:11:38 · 5 answers · asked by Anonymous in Mathematics

thanks, please show me how you did it as well

2007-12-14 22:57:38 · 17 answers · asked by I-like-to-answer-you 2 in Mathematics

If -2d+5= -31, what is the value of 3d-9?

I need to know how you would do this...'cause I really have no idea what it's asking. Damn math! ( e_e)9

2007-12-14 22:40:17 · 7 answers · asked by Anonymous in Mathematics

2007-12-14 22:18:57 · 7 answers · asked by nithya mahi 2 in Engineering

Let,
Points
A=1
B=2
C=3
D=4
E=5
F=6
G=7
H=8
I=9
J=10
K=11
L=12
M=13
N=14
O=15
P=16
Q=17
R=18
S=19
T=20
U=21
V=22
W=23
X=24
Y=25
Z= 26.
So, find any word of 100 points.
Like this,
DOG
D=4, O=15, G=7
4+15+7=26
But I want 100 points of word.

2007-12-14 22:13:23 · 4 answers · asked by *VJ* 2 in Mathematics

2007-12-14 22:11:29 · 4 answers · asked by Hanna M 1 in Weather

2007-12-14 22:01:03 · 5 answers · asked by jemuel p 1 in Earth Sciences & Geology

prove that agroup of order 12 must have an element of order 2

2007-12-14 21:47:31 · 2 answers · asked by Anonymous in Mathematics

2007-12-14 21:42:05 · 15 answers · asked by Anonymous in Astronomy & Space

Solve.

(x + 2)(x - 3) = x^2 - 11




and




3x^2+18x - 2 = 0




Please show steps.

2007-12-14 21:40:18 · 7 answers · asked by Anonymous in Mathematics

I came up with:

-7 +/- (sqrt47)

2007-12-14 21:24:09 · 9 answers · asked by Anonymous in Mathematics

i don't really know the different..help me

2007-12-14 21:20:47 · 3 answers · asked by Amy Lyana 1 in Engineering

I came up with:

+/- (sqrt14)/9

2007-12-14 21:16:38 · 9 answers · asked by Anonymous in Mathematics

letIGI =15 if G has only one subgroup of order 3 and only one of order 5 prove that G is cyclic generize for IGI =pq

2007-12-14 21:16:25 · 1 answers · asked by Dana S 1 in Mathematics

2007-12-14 21:10:28 · 4 answers · asked by sama 1 in Botany

I have read that the longest word in the English language is 1,909 letters long and it refers to a distinct part of DNA.

2007-12-14 21:03:10 · 1 answers · asked by tianjin 1 in Chemistry

i want to know is sum close to earth while winter or summer and why

2007-12-14 21:00:15 · 3 answers · asked by janu 2 in Astronomy & Space

punjwa@yahoo.co.in

2007-12-14 20:57:02 · 13 answers · asked by sharif d 1 in Astronomy & Space

An accident at a UK nuclear reprocessing plant caused an area of local moor-land to be contaminated with the radioactive isotope cobalt-60, which has a half-life of 5.23 years. The radioactivity of the moor-land just after the accident was measured at 500 bequerels.m-2.

Public access to the moor-land was restricted until the level of radioactivity
fell to 1.0 bequerel.m-2. How long must access be restricted ?

useful equation:

In {original activity / existing activity} = k x time taken.



Hint : First use the value of the half-life and the logarithmic relationship between radioactivity and time, given above, to determine k, the rate constant.

Now use the value of k obtained to predict the access restriction time.

2007-12-14 20:50:50 · 3 answers · asked by Anonymous in Physics

Have you tried?

Most intersting and/or technically "correct" response gets the points.

2007-12-14 20:44:50 · 6 answers · asked by Anonymous in Other - Science

which of the following disinfectants is sporicidal viriocidal and bactericidal?
1.sodium hypochlorite
2.benzyl alcohol
3.chloroxylenol
4.gluteraldehyde
5.hexachlorophane

2007-12-14 20:12:59 · 3 answers · asked by the boy 2 in Medicine

2007-12-14 20:08:09 · 6 answers · asked by francisco g 1 in Astronomy & Space

Why the elements in Group I and II are always soft and less denser while others are hard and high denser? What structure cost this? They all are both held by metallic bond.Is that because of less electrons in electron sea, so the attractive between the sea and the cation become smaller?

Don't tell me Group I is less dense because they got less outermost shell electrons only.... I want to know WHY!

2007-12-14 20:04:07 · 2 answers · asked by Anonymous in Chemistry

I have a vineyard it 9 years old, the past 4 years my sauvignon blan has been down almost 10 tonnes what should i do?

2007-12-14 19:47:06 · 2 answers · asked by Anonymous in Agriculture