Science & Mathematics - 22 November 2007

I was wondering what it meant because for the past two days, three stars have alined. Thanks for your help!

2007-11-22 14:34:39 · 10 answers · asked by コオトニ 2 in Astronomy & Space

SO2, CO, CF4, OR H20? How can I tell?

2007-11-22 14:30:42 · 4 answers · asked by People J 2 in Chemistry

does anyone know anyhing about baking soda and human ph levels.
also, about the water alkaline machines?

2007-11-22 14:30:41 · 1 answers · asked by houstonretina 1 in Chemistry

Is the sun usually down therefore the day is shorter??
Or whatttttt??????

2007-11-22 14:29:53 · 7 answers · asked by Anonymous in Weather

urgent, please help

2007-11-22 14:24:41 · 4 answers · asked by weasel 4 in Mathematics

If density or mass does affect acceleration, then how can they conclude that every object accelerates at 9.8 m/s^2 on earth.

2007-11-22 14:23:21 · 6 answers · asked by Dream.Big 4 in Physics

In regards to the mono-chlorination of 2,2-dimethylbutane

2007-11-22 14:16:37 · 1 answers · asked by Anonymous in Chemistry

2007-11-22 14:15:52 · 1 answers · asked by olarewaju michael 1 in Chemistry

In regards to the mono-chlorination of 2,2-dimethylbutane

2007-11-22 14:15:13 · 1 answers · asked by Anonymous in Chemistry

The pitch of a roof is its slope. If the roof is 20 feet long and 5 feet from its base to its peak, what is the pitch of the roof?

2007-11-22 14:14:45 · 6 answers · asked by CG ~!~ 2 in Mathematics

If so, can carbon be added, safely?

2007-11-22 14:14:37 · 2 answers · asked by Anonymous in Chemistry

I was watching a new BBC programme called Earth: The Power of the Planet and it said that the earliest lifeforms to come into existence were single-celled bacteria called stagocytes (?). Are they our ultimate ancestors in evolutionary terms or were there other, subsequent instances of new lifeforms coming into being?

In other words, was life sparked more than once?

2007-11-22 14:08:55 · 5 answers · asked by celtish 3 in Biology

thanks

2007-11-22 14:03:02 · 6 answers · asked by germanmonkey1 1 in Mathematics

Water is H2o, is the froth, the gaining or losing of a molecule?

2007-11-22 14:02:51 · 1 answers · asked by Anonymous in Chemistry

Every year it is the same colour! what makes it that way? and don't tell me it's just dirt, please

2007-11-22 13:58:02 · 5 answers · asked by Catherine la Sardine 2 in Other - Science

Acetyl chloride (C2 H3 CLO). What mass of aspirin is produced by the reaction of 40.0g of Salicylic acid and 30.0g of acteyl chloride
C7 H6 O3 + C2 H3 CLO ----> C9 H8 O4 + HCL

2007-11-22 13:57:55 · 2 answers · asked by jamie d 2 in Chemistry

Like what we look at, is not present.
Anyways, do you think this could have anything to do with time travel, just hypothetically.
Do you think time travel has anything to do with this?

2007-11-22 13:52:00 · 14 answers · asked by Anonymous in Astronomy & Space

OKAY! This is SERIOUSLY bugging me. I can just BARELY get the answer with barely understanding wtf I'm doing.
When you're trying to factor a function is it basically trial and error when it's not a perfect square???
Also, how do I put -5t^2+20t+50 into mx+b to determine the time?

2007-11-22 13:49:27 · 4 answers · asked by Bo 3 in Mathematics

I'm looking for the cities that have cold or cool weather during all year ( 32-70F) not windy, or extremely wet, and with a nice quality of life:
-Vancouver, BC
-Calgary,AB
-Toronto,ON
-Seattle, WA
-Florence,It
-La Coruña, Spain
-Dublin, Ir
-Auckland, NZ
-Milan, It
-Barcelona,Spain
-Luxembourg
-Geneve, Switzerland
-San Marino
-Amsterdam, Holland
-Oslo, Norway
-Bologne, Italy
-Edimburg, Scotland
-****
For example

2007-11-22 13:49:05 · 2 answers · asked by Gabrio 7 in Weather

2007-11-22 13:47:35 · 5 answers · asked by samurai 1 in Mathematics

where could i go to or how could i create a numbers generator and be able to program it to stop on certain past number sequences to develope a pattern for upcoming numbers

2007-11-22 13:39:05 · 1 answers · asked by howdog_03 1 in Physics

2007-11-22 13:36:55 · 2 answers · asked by Salvador 2 in Chemistry

2007-11-22 13:33:40 · 4 answers · asked by lirael1019 1 in Astronomy & Space

1.(a)For the quadratic y = x² - 6x – 27 ,( without using your graphics calculator)
(i) factorise by inspection and find the x intercepts
(ii )find the y intercept
(iii)find the coordinates of the vertex
(iv)find the minimum value

(b)For the quadratic use your graphics calculator to find, (correct to 2 dp) [Using X min =-6.3 X max 6.3 scale = 1, Y min = - 6.2 Y max = 3.1 scale= 1]
(i)the x intercepts
(ii)the y intercept
(iii)the coordinates of the vertex
(iv)the minimum value
2.
(i)Simplify leaving your answer in surd form with an integer denominator.
(ii)Simplify leaving your answer in the form .
(iii)Simplify 2(5 - 3i) - 3(7 -4i) into the form a + bi
(iv)Simplify ( 2 – 3i) ( 5 + 2i ) into the form a + bi

3.Use the discriminant to find how many zeros, and if real or imaginary, for the quadratic y = 4 -5x +2x²

4.Solve, using the quadratic formula, the exact solution(s) to x² - 6x + 13 = 0

PLEASE HELP ASAP!

2007-11-22 13:32:09 · 2 answers · asked by Jessa 2 in Mathematics

how does latitude, relief/elevation,waterbodies,air masses, and ocean currents affect the climate?

2007-11-22 13:20:50 · 3 answers · asked by darkliquid_dreams 2 in Geography

In need of chemistry help... again... these problems are complicated. How exactly can you find the empirical formula WITHOUT percentage?

A 3.62g sample of a compound containing C, H, and O only burned in air and made 5.19g of CO2 and 2.83g of H2O. What is the empirical formula of the compound?

---AND---

Potassium persulfate is a chemical used for photodeveloping. By mass, potassium persulfate has 28.9% potassium, 23.7% sulfur and the rest is oxygen. What is the empirical formula of this compound?

2007-11-22 13:15:59 · 2 answers · asked by mikita_daita 1 in Chemistry

need helpp !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
please answer will be very helpfull!!!

2007-11-22 13:15:29 · 3 answers · asked by choudhry a 1 in Biology

2007-11-22 13:12:35 · 3 answers · asked by muhammad sharif 1 in Mathematics

2007-11-22 13:12:10 · 6 answers · asked by lirael1019 1 in Astronomy & Space

2007-11-22 13:11:53 · 2 answers · asked by carrag01 1 in Weather