Science & Mathematics - 14 January 2007

2007-01-14 08:12:49 · 14 answers · asked by chrstrtgrumpy 1 in Zoology

2007-01-14 08:11:58 · 4 answers · asked by 1ncbitten2wcshy 2 in Mathematics

PROBLEM: on one flight, the airline sold twice as many economy class tickets a business class tickets. economy class costs $400 and business class costs $900. five of the economy class ticket holder remeemed a voucher and did not have to pay. the total revenue for the flight was $49,000.

a) solve the equation for n, the number of business class travelers:
900n + 400(2n - 5)= 49,000.



b) how many people traveled economy class,

2007-01-14 08:11:57 · 6 answers · asked by Countess Blavinskeya 2 in Mathematics

2007-01-14 08:11:07 · 11 answers · asked by Anonymous in Geography

2007-01-14 08:10:38 · 7 answers · asked by johndixon_2000 1 in Chemistry

I whatched Titanic but i dont know for sure.

2007-01-14 08:08:08 · 3 answers · asked by Anonymous in Earth Sciences & Geology

1) multiplication
2) exponents
3) brackets
4) addition

2007-01-14 08:07:50 · 4 answers · asked by Anonymous in Mathematics

(cosx + sinx) / (cosx - sinx) = (1+sin2x) / (cos2x)

thanks!

2007-01-14 08:07:07 · 2 answers · asked by sandcastlesinair 1 in Mathematics

2007-01-14 08:06:20 · 4 answers · asked by iluvcaliii06 2 in Astronomy & Space

I would like sites with pictures of tower crane control panels (buttons, levers, indicators etc)
Tower cranes are the ones used to build large/tall buildings.
They are the common cranes you see around

if you know also sites which explain the control panel of these cranes it will be also accepted.

2007-01-14 08:04:57 · 1 answers · asked by Anonymous in Engineering

2007-01-14 08:02:25 · 2 answers · asked by viktoria y 1 in Chemistry

Does anyone remember how to do the primary science project with the bowl of water and the glass with a paper towel stuffed inside? I remember that You place the glass down directly in the center of the bowl and the paper towel stays dry...Help Please

2007-01-14 08:01:17 · 1 answers · asked by pickievickie 1 in Physics

HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!1

2007-01-14 08:01:00 · 4 answers · asked by maggie 1 in Chemistry

2007-01-14 08:00:38 · 2 answers · asked by Ej 1 in Physics

when i solve it i get
3x^2+ 3x - 2x - 2 = 0
3x^2 +x - 2 = 0

but its the next part that i get confussed at
Please explain to answer to me

2007-01-14 07:59:21 · 7 answers · asked by Anonymous in Mathematics

The full structural formula for cyclopentene.

2007-01-14 07:58:48 · 6 answers · asked by Stephanieee! 1 in Chemistry

Nitrogen and hydrogen gas react to form ammonia gas as follows:
N2(g) + 3H2(g) -> 2NH3(g)

At a certain temperature and pressure, 1.2 L of N2 reacts with 3.6 L of H2. If all the N2 and H2 are consumed, what volume of NH3, at the same temperature and pressure, will be produced?

At first I thought you could just add the volumes, but the densities of the gases would be different so it wouldn't work. Then I thought that you colud use the idea that a mole of gas occuptied 22.4 L at STP, but you don't know if the gases are at STP. What do you do? Thanks.

2007-01-14 07:57:29 · 2 answers · asked by Anonymous in Chemistry

The ramp (picture link) is 18 meters long and 4.5 meters high.

*picture link: http://img206.imageshack.us/img206/2450/scangd4.jpg

a.What force, parrallel to the ramp (Fa) is required to slide a 25 kg box at constant speed to the top of the ramp if friction is disregarded?
b. What is the ideal mechanical advantage of the ramp?
c. What are the real mechanical advantage and the efficiency of the ramp if a parrallel force of 75 N is actually required?

Please help me with this problem.
I'm having trouble understanding it.

I asked this question before, but I was unable to get any help.

2007-01-14 07:56:57 · 2 answers · asked by swimmertommy 1 in Physics

Are they purple?? Or like a dark blue?? Has anyone ever met someone with violet eyes??

2007-01-14 07:56:38 · 8 answers · asked by Anonymous in Biology

2007-01-14 07:55:11 · 6 answers · asked by NIKKA 1 in Botany

Please help, I'm really confused.

2007-01-14 07:54:10 · 16 answers · asked by coffeekeepsmeawake88 2 in Mathematics

whats the full structural formula and systematic name for the hydrocarbon
a) (CH3)3CCCH
b) CH3CH2CCCH3

2007-01-14 07:52:29 · 3 answers · asked by Stephanieee! 1 in Chemistry

2007-01-14 07:40:31 · 1 answers · asked by wildflowerrb 2 in Zoology

need to check

2007-01-14 07:40:08 · 13 answers · asked by Anonymous in Zoology

I often hear of the search for a graviton
but as I understand it gravity is not an energy particle per se
or even sub particle at all. (A unified field maybe?).
As I underastand it any mass has some form of connection to all mass in the universe.
What affects a mass on the spiral arm has an effect on a mass on the other side of the galaxy it might be almost infinitessimily small but it is there. So if gravity does not work on any particle exchange theory but functions as it does because it's mass impacts on the omnipresent space-time soup (I happen to think this soup as a Higgs boson field type or similar) why is there still a search for a graviton as in particle?

2007-01-14 07:39:18 · 4 answers · asked by farshadowman 3 in Astronomy & Space

please show me a tutorial of simplfing and solving the following rational
3x^5 *15xy two rational expressions
2y^3 9x^2 being divided then multiplied

(pretend theres a division line )

2007-01-14 07:39:11 · 2 answers · asked by kast5788 1 in Mathematics

Mg2 + Fe(NO3)3 = Mg(NO3)2 + Fe

2007-01-14 07:38:59 · 3 answers · asked by Anonymous in Chemistry

Do you think aliens live in earth or what?

2007-01-14 07:38:44 · 9 answers · asked by my life 2 in Astronomy & Space

2007-01-14 07:38:37 · 4 answers · asked by godisgreat 1 in Botany

2007-01-14 07:36:49 · 2 answers · asked by Anonymous in Zoology