Science & Mathematics - 31 December 2007

2007-12-31 07:49:43 · 3 answers · asked by Anonymous in Earth Sciences & Geology

2007-12-31 07:49:35 · 3 answers · asked by Em 3 in Chemistry

2007-12-31 07:47:17 · 3 answers · asked by Anonymous in Physics

2007-12-31 07:46:32 · 6 answers · asked by Anonymous in Physics

Given the reaction at equilibrium:
N2(g) + 3H2(g) <--> 2NH3(g) = heat
At constant temperature, which changes would produce a greater yield of NH3(g)?

a- decreasing the pressure and decreasing the concentration of N2(g)
b- increasing the pressure and decreasing the concentration of N2(g)
c- increasing the pressure and increasing the concentration of N2(g)
d- decreasing the pressure and increasing the concentration of N2(g)

thanks in advance =)

2007-12-31 07:46:04 · 2 answers · asked by person 3 in Chemistry

2007-12-31 07:45:36 · 4 answers · asked by Anonymous in Earth Sciences & Geology

Sharu has 2.35 in nickels and dimes. If he has a total of thirty-two coins how many of each coin does he have?

2007-12-31 07:44:56 · 7 answers · asked by anth 1 in Mathematics

2007-12-31 07:43:35 · 5 answers · asked by Anonymous in Physics

#1

A number n decreased by 8

it is N - 8 right or wrong

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#2
evaluate the expersion for v = 8

25 - v = 17 right or wrong
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#3
a number decreased by 2

2 - n right or wrong

2007-12-31 07:41:06 · 3 answers · asked by Anonymous in Mathematics

Let say NASA built a space ship, assemble it in space, can water be use as propusion in a form of steam? It can be easily heated in space to form a steam, pls don't vent your steam on me tnx. ;-)

2007-12-31 07:40:51 · 21 answers · asked by spacetrooper50 2 in Astronomy & Space

I really just need to know how to find the equation.....I know how to change it to standard form.

2007-12-31 07:37:54 · 4 answers · asked by rocky_aka_omari 1 in Mathematics

2007-12-31 07:34:22 · 3 answers · asked by Anonymous in Biology

if a country were to ban all firearms and explosives does the technology exist to enforce such a ban?

2007-12-31 07:30:01 · 2 answers · asked by Mister2-15-2 7 in Other - Science

can u help me 4 my pro:?????

i need it as conclusion...........

2007-12-31 07:25:50 · 7 answers · asked by abhi 1 in Mathematics

how would it be a tsunami if its only 6 inches?!?!?

2007-12-31 07:23:22 · 6 answers · asked by CatyKins 2 in Earth Sciences & Geology

3.Write a decimal to represent 56%.
A. 0.56
B. 0.31
C. 0.34
D. 0.65

6.2% of what number is 5?
A. 210
B. 156
C. 250
D. 280

8.If Karen sells $2,300 worth of goods and receives an 11% commission with a base pay of $150, how much would her paycheck be?
A. $403.00
B. $523.40
C. $378.98
D. $345.00

9.42 is 120% of what number?
A. 31
B. 35
C. 12
D. 15

10.If a dryer is on sale for $250 after a 20% reduction, what was the original price?
A. $410.25
B.$213.40
C. $312.50
D. $560.50

2007-12-31 07:23:10 · 4 answers · asked by Anonymous in Mathematics

I really need them because i'm righting a travel brochure on venus *hee hee*

2007-12-31 07:18:24 · 3 answers · asked by Maxine S 2 in Earth Sciences & Geology

Buffer solution:
5 mL 0.20M CH3COOH
5 mL 0.20M NaCH3COO
upon addition of strong acid: 0.05 mL 1.0M HCl

Calculate pH of solution.

2007-12-31 07:17:39 · 3 answers · asked by olympus-sza 1 in Chemistry

2007-12-31 07:16:04 · 13 answers · asked by Mike M 1 in Astronomy & Space

... a wizard rocket. I know that I shoul use estes, but it's a science experiment. I need this information for Aerotech, and Quest Aerospace. Thanks

2007-12-31 07:14:02 · 5 answers · asked by Anonymous in Engineering

box A contains 5 white balls and 7 red balls and box b contains 6 white and 4 red balls. A box is chosen at random and then a ball is drawn from it. the probability that the ball is red is
4/11
1/2
59/120
4

2007-12-31 07:13:07 · 5 answers · asked by jojo 1 in Mathematics

Ok, im doing a science project and this project is about making a brochure about a planet, im supposed to pretend im a travel agent. anyway, you have to have a theme for your planet such as a ski resort, beach resort, or racing. anything like that. well i was going to do a beach resort but i dont know if there is water on saturn. so the question is, is there any type of water on saturn such as lakes, oceans, or rivers? can anyone tell me please.

2007-12-31 07:13:07 · 8 answers · asked by Anonymous in Astronomy & Space

http://img183.imageshack.us/img183/4245/trianglesec4.png

This is what I have so far

Statement | Reasons

AB = BC given
DB = DB reflexive prop of seg. congruence


Since there's no SSA postulate, there must be something else missing. can someone please help

2007-12-31 07:12:26 · 5 answers · asked by himynameis. 2 in Mathematics

2007-12-31 07:12:23 · 5 answers · asked by Anonymous in Zoology

2007-12-31 07:11:30 · 2 answers · asked by diamonds_are_forever<3 3 in Earth Sciences & Geology

I know electrons and protons have opposite charges, but why did they decide the electron is negative and the proton is positive? What the the positive and negative words mean exactly? Why can't the electrons be positive and the protons be negative?

Understand my confusion?

2007-12-31 07:10:17 · 5 answers · asked by Anonymous in Physics

1. A cubic Polynomial function f has constant term -2 and leading coefficient 4. Suppose f(2)=24 and f(-3)=-86. Find the cubic plynomial.

2. multiply: (x-5)^3....show me the shortcut

3. How many times does the graph of the function intersect the x-axis? List the zeros of the function and tell which, if any, are double or triple zeros.
y=(x+1)(x+2)^2(x+4)

2007-12-31 07:10:04 · 6 answers · asked by Anonymous in Mathematics

2007-12-31 07:09:47 · 2 answers · asked by Anonymous in Biology

I'm on a F.I.R.S.T. FRC robotics team... we were given hints to what our game is gonna be... here's the first hint:

42.349905
-71.076072
342.242026


What do you think these numbers stand for? We're thinking it migh have something to do with the IR codes... What do you think?

2007-12-31 07:05:22 · 5 answers · asked by amber211 2 in Engineering

Ok I'm going to talk as if this really happened so it makes more since!!!

I wanted to time travel into the future with my time watch one day and so I was thinking im only going to go 24 hours into the future, but I go out and buy a rifle just in case something happens because im just visiting the future anyways, ill just go back in time and the whole thing would have never happened so whats the difference, so when I go into the future 24 hours I walk into my room first to see if there will be another me or not and there is another me, but he has a pistol pointed at me, and I was wondering what was going on because I don't have a pistol and im confused, he told me to put the gun down and he wont shoot, but I decided to kill the other me and just go back to where I came from and the whole thing would have never happened. But oh no now I know that in 24 hours another me will show up with a gun so I get a pistol to kill him first, if I still die, would "I" still be alive or him?

2007-12-31 07:03:35 · 7 answers · asked by Anonymous in Earth Sciences & Geology