Science & Mathematics - 8 October 2007

can someone please explain the AC Method to me....i forget how to do it in equations such as 7x^2-33a-10, or 10x^2+x-3

thanks

2007-10-08 10:32:07 · 1 answers · asked by Anonymous in Mathematics

thanks im gettting 5/sqrtofx^2-25 but not sure

2007-10-08 10:32:05 · 2 answers · asked by programhelp 2 in Mathematics

2007-10-08 10:31:45 · 2 answers · asked by haleser3 3 in Zoology

What property represents this problem? (z+b)1=z+b

It is not the distributive propety

2007-10-08 10:29:50 · 4 answers · asked by Anonymous in Mathematics

2007-10-08 10:29:36 · 5 answers · asked by haleser3 3 in Zoology

I just wanted to see who was right!

2007-10-08 10:29:10 · 5 answers · asked by Anonymous in Mathematics

11p-6 = 3p+10

2007-10-08 10:28:49 · 22 answers · asked by Anonymous in Mathematics

Chemistry question...My instructor said that all we need to know is Latin, which I obviously don't.

2007-10-08 10:28:16 · 4 answers · asked by K 2 in Chemistry

The way that chemistry students are usually introduced to the concept of atomic spectra is through a discussion of element "lamps" - like the helium lamp or the hydrogen lamp. (Consider, for example, the images at http://hyperphysics.phy-astr.gsu.edu/hbase/quantum/atspect.html.) I do not understand why splitting the light emitted from these lamps (by using, say, a prism) allows us to see a myriad of colors as opposed to just one color. How do these element lamps energize the electrons in such a way that we see wavelengths of light corresponding to multiple electron transitions instead of just one? (When one conducts a flame test for metallic ions, for example, one sees only a single color, not multiple ones...unless I've got it all wrong.)

2007-10-08 10:26:26 · 1 answers · asked by AxiomOfChoice 2 in Chemistry

2007-10-08 10:26:00 · 1 answers · asked by Anonymous in Biology

and why?

2007-10-08 10:24:43 · 1 answers · asked by Sumone 1 in Biology

A 800 N force is exerted on the 60 kg box toward the 90 kg box. Calculate:
a) The accleration of the boxes.
b) The magnitude of the action / reaction forces between the boxes.

2007-10-08 10:19:31 · 1 answers · asked by Anonymous in Physics

lie on the following lines

2007-10-08 10:19:04 · 2 answers · asked by m m 1 in Mathematics

Something happened in TUNGUSKA but no one seems to know for sure.
All will agree that there was a terrible explosion from something striking the earth. What was it?

http://www.ibc34.com/TUNGUSKA

2007-10-08 10:17:37 · 9 answers · asked by Eywrshp 2 in Astronomy & Space

Two populations of bacteria are growing exponentially in separate petri dishes. The population in the first dish has growth constant 0.13 and initial population 2000. The population in the second dish has growth constant 0.08 and initial population 5000.

Part 1. Find the time at which the popluations are equal. Your answer must be correct to two decimal places.

Part 2. What is the common value of the two populations at that time? Round your answer to the nearest whole number.

If you can do this problem, let God be with you (lol)

2007-10-08 10:17:35 · 2 answers · asked by aha51806 2 in Mathematics

5+7p=19

2007-10-08 10:17:04 · 5 answers · asked by Anonymous in Mathematics

I dont understand how to do it... Id appreciate if you can show the steps used to solve the problem so I will be able to understand similar problems.

2007-10-08 10:16:45 · 2 answers · asked by damasta_007 1 in Mathematics

a) what is its speed when it is at maximum height?
b) how far the launch site will kiwi strike the ground?
c) what will be its speed upon impact upon impact with the ground?

2007-10-08 10:13:34 · 1 answers · asked by Anonymous in Physics

Example, for k=6, and n=20 what is the probability of having every side of {1,2,3,4,5,6} show up at least once out of 20 rolls.
At first thought it would be (1-(5/6)^20)^6 but that is wrong since for 5 rolls (1-(5/6)^5)^6=.045 but it should be zero percent chance as it's impossible for all 6 sides to show up in only 5 rolls.

k=2, n=5 would be the probability of both {heads} and {tails} showing up at least once out of 5 flips of the coin.

etc.

Looking for the general case.

2007-10-08 10:12:45 · 4 answers · asked by Mike S 2 in Mathematics

2007-10-08 10:12:34 · 2 answers · asked by milcahcutesya 2 in Mathematics

2007-10-08 10:11:29 · 5 answers · asked by Anonymous in Mathematics

2007-10-08 10:09:03 · 10 answers · asked by Pfalzer 1 in Mathematics

2007-10-08 10:08:32 · 3 answers · asked by Anonymous in Mathematics

2007-10-08 10:08:20 · 2 answers · asked by Anonymous in Mathematics

please answer.

2007-10-08 10:03:39 · 2 answers · asked by eru_desu94 2 in Chemistry

2007-10-08 10:01:46 · 4 answers · asked by Anonymous in Mathematics

2007-10-08 10:01:26 · 6 answers · asked by kev_m_2006 2 in Geography

The melting point at 1 atm 0.0C
Cwater(s)=2.09 J/g C
Cwater(l)=4.21 J/g C
delta H fus=6.02 kJ/mol
answer in joules

2007-10-08 10:01:17 · 1 answers · asked by unknown 1 in Chemistry

does anyone know the date of the northern lights? i wanna sit outside and watch them but i dont know the date btw i live in minnesota incase its important

2007-10-08 10:01:14 · 4 answers · asked by paul_x_walker 2 in Astronomy & Space

2007-10-08 09:59:59 · 1 answers · asked by smarty 1 in Chemistry