Science & Mathematics - 31 August 2007

2007-08-31 06:35:52 · 2 answers · asked by Alexander 6 in Physics

HCl + THC ---->

2007-08-31 06:35:36 · 1 answers · asked by Anonymous in Chemistry

The density of air at room temperature is (25 C) is 1.11x10^-3 kg/L. How many grams of air are in a room measuring 12.1 x 7.2 x 2.0 m?

please show your work so I can check it against mine... Thanks for your help!!

2007-08-31 06:33:38 · 7 answers · asked by C K 3 in Chemistry

I had to miss school today because I was sick and my parents wouldn't let me go... and I'm looking over the homework, and there is this question: (I don't want the answer!!!)

-5x
*
[2x -6y]
[4b -8a]

(it's a 2x2 matrix, in case it's hard to tell the entries apart)

My question is this: Is there any more simplified version of -5x * -6y than -5x*-6y ?

Like for -5x * 2x I'm pretty sure that's -10x, but for all of the other entries the only way that I can think of answering them is with the same question like for the 4b entry, the only way I can think of answering that is -5x*4b ... is that what I'm supposed to put? Or am I doing something totally wrong?

2007-08-31 06:32:18 · 5 answers · asked by ChipChamp 4 in Mathematics

I don't think it could be an all or mostly visual thing? is it smell? Like what deoderant you wear or natural body chemicals?

2007-08-31 06:31:28 · 7 answers · asked by Anonymous in Zoology

HCl + THC ---->

2007-08-31 06:31:02 · 2 answers · asked by Anonymous in Chemistry

2007-08-31 06:27:26 · 3 answers · asked by ? 7 in Astronomy & Space

Fluorine has a single atomic species, 19F. Determine the atomic mass of 19F by summing the masses of its protons neutrons and electrons, and compare with the value of the atomic mass from the periodic table. Explain why the agreement is poor

2007-08-31 06:24:54 · 1 answers · asked by Mr.Pie 1 in Chemistry

so on xy axises, the little thing is (-2,0) which one is x and which one is y??

2007-08-31 06:22:09 · 9 answers · asked by kissesfromhvn807 2 in Mathematics

Solve by using the quadratic formula.
x^2=x+5

2007-08-31 06:21:15 · 6 answers · asked by dtrain2419 1 in Mathematics

Hi! I'm supposed to prove a trigonometric identity with this pile of crap, and I'm not sure exactly what to do. I thought that I had a pretty solid understanding of how to do this, but then I came to this problem! I'm now starting to think that maybe I just lucked out with the past 500+ problems that I did because I can't figure this one out for the life of me! It seems so easy, but everything that I tried just falls short of what I expected. Maybe someone can help!

( 1 - 2cos²(y) ) ' ' ' ' ' ' ' ' ' ' ( sin(y) + cos(y) )
--------------------------- = --------------------------
( 1 - 2cos(y)sin(y) ) ' ' ' ' ' ' ( sin(y) - cos(y) )


Thanks so much! I'll pick a best answer TODAY!

2007-08-31 06:20:47 · 5 answers · asked by Anonymous in Mathematics

how many can it contain all at once?

2007-08-31 06:18:26 · 0 answers · asked by Mutley 6 in Chemistry

do you think humans and monkeys/apes will ever be able to have babies 2geva

2007-08-31 06:13:53 · 21 answers · asked by beany 2 in Biology

I took Neurontin for 8 years but then I had blurry vision. So i tried other meds but they didnt work. so my doctor put me back on Neurontin just a lower dose (I used to be on 2400mg now I'm on 1200 mg). My dad, who works for Pfizer, isnt happy about this drug.

2007-08-31 06:10:24 · 11 answers · asked by lys 1 in Medicine

other that giving us the creeps.

2007-08-31 06:10:05 · 6 answers · asked by Anonymous in Biology

2007-08-31 06:08:20 · 13 answers · asked by jeffrey p 1 in Chemistry

The reaction 2NO --> N2 + O2 has the following rate law:

-D[NO]/Dt = 2k[NO]^2

After a period of 2.0 x 10^3 s, the concentration of NO falls from an initial value of 2.8 x 10^-3 mol/L to 2.0 x 10^-3 mol/L. What is the rate constant, k?

2007-08-31 06:06:47 · 1 answers · asked by Anonymous in Chemistry

Like whether a Kleenex box could be deadly in an accident. If you know how much force it takes to crack a human skull, couldn't you just weigh the box and calculate the velocity necessary to create that force, and then from other accident reports figure the maximum speed able to be transferred to that box? Instead they're making ballistic dummies and crashing cars all over the place.

2007-08-31 06:04:04 · 9 answers · asked by Anonymous in Physics

A- Transcription
B- A new adaptation
C- a mutation
C- Natural selection

please can someone give me a hint? I am real bad at this topic.

2007-08-31 06:02:44 · 10 answers · asked by Mari 1 in Biology

i just wanna know

2007-08-31 06:02:38 · 4 answers · asked by emo b 1 in Zoology

As many of you know, there are several thousand people who die each year while waiting for an organ transplant. The main reason is because there are not enough people who sign organ donor cards. Here's the solution: We establish an organ donor lottery, where people who have signed cards and die and donate organs (suicide excluded) are entered into a lottery where their beneficaries could win a million dollars. There would not just be one winner each year, but 20 or 50 winners. So, the possibility that a person who has signed a card, died and donated an organ would win is quite high. The donor would would be doing the right thing - signing the donor card to help strangers as well as his family. Wealthy benefactors would be eager to finance the lottery in order to save thousands of lives. This is a win-win situation which would make heroes out of people who have signed the donor card, and this plan would save literally thousands of lives per year.

2007-08-31 06:01:28 · 3 answers · asked by The Oracle of Omigod 7 in Medicine

If I'm correct, it's 45.82%, right?

TIA

2007-08-31 05:55:42 · 5 answers · asked by Anonymous in Mathematics

2007-08-31 05:51:49 · 6 answers · asked by Anonymous in Zoology

I know spherometers are used to measure concave hand-ground mirror surfaces, but I want to know what I'd use to measure a convex surface if I tried grinding my own refractor lense.

I wouldn't do it by hand though, I'd try to make like a pottery spinning wheel and automatically do the grinding by keeping the pressure, rpm , and exposure time constant, and just measuring the surface till I got it right. But I'd need something to measure the surface with. What do I do ?

2007-08-31 05:49:34 · 2 answers · asked by fuck y 1 in Astronomy & Space

It is going to come within 22,000 miles of Earth in 2029 (one tenth the distance to the moon) but on it's next 7 year orbit it will be on a direct collision course.

2007-08-31 05:46:43 · 18 answers · asked by GBH 1 in Astronomy & Space

2007-08-31 05:45:15 · 2 answers · asked by tchoxi2000 1 in Earth Sciences & Geology

2007-08-31 05:44:55 · 11 answers · asked by Irish 1 in Astronomy & Space

i thik the sun will heat it up to much and will make it explode!

2007-08-31 05:42:27 · 24 answers · asked by casey 5 in Astronomy & Space

i want to make an advertisement to sell it. But i don't know what it could be used for. I want to make an advertisement o fit using it's physical properties like its very elastic and stretchable. It flattens after 30 sec. if u put it on a flat surface rolled up as a ball. etc.

So what could use the "Glurch Slime for" ?????

2007-08-31 05:41:49 · 2 answers · asked by Anonymous in Physics

To rent a ball field for a game costs a $300 basic fee plus a $2 fee per person. If X persons attend the game which equation can be used to find T the total cost of renting the field......
T= 2x+300
T= 300x +2
T= (300+2)x
T= 300 +2 OVER x
T= (300)(2x)

2007-08-31 05:41:46 · 5 answers · asked by Anonymous in Mathematics