Science & Mathematics - 17 February 2007

y = cos-1 (3xx + 2)


Overthere is (x square)

2007-02-17 18:43:16 · 3 answers · asked by conkfasi 2 in Mathematics

Could you please help me to verify the following informaiton?

Ethanoic acid H-(CH2)-COOH (Pure boiling point)118.1 °C
but when Aqueous equal 3.0* %, boiling point becomes 76.6°C

May consider CRC handbook
and why could it happen this way?
I tested household venigar's boiling point before. The boiling point is slightly higer than 100°C.

Anybody can help? Thank you very much.

2007-02-17 18:43:11 · 3 answers · asked by Bonnie 2 in Chemistry

2007-02-17 18:41:44 · 7 answers · asked by pulivarti b 1 in Chemistry

2007-02-17 18:41:32 · 2 answers · asked by Babai 1 in Chemistry

2NO2(g) ↔ N2O4(g) is an equilibrium reaction at 25oC, where Kp = 8.77 atm-1.
If the equilibrium partial pressure of NO2(g) is 0.214 atm, what is the equilibrium partial pressure of N2O4(g) in atm ?

2007-02-17 18:41:31 · 2 answers · asked by Anonymous in Chemistry

I saw a news article a while back claiming that in order for the Big Bang theory to be plausible then we'd need to accept that the stars and plants traveled faster than the speed of light --- which according to Einstein is impossible- No?. Hoping you can help me find similar article / web site. Thank you.

2007-02-17 18:40:38 · 8 answers · asked by Giggly Giraffe 7 in Astronomy & Space

2007-02-17 18:40:29 · 4 answers · asked by Yasmin G 1 in Physics

In the gas phase one mole of N2 and three moles of H2 react to form two moles of NH3 At T = 298 Kelvin , Kp = 560000 atm-2

If four moles of NH3 react to form two moles of N2 and six moles of H2 , calculate Kp at the same temperture.

2007-02-17 18:40:20 · 3 answers · asked by Anonymous in Chemistry

2007-02-17 18:39:58 · 1 answers · asked by Yasmin G 1 in Physics

It has narrow white-banded tail, found in high latitudes in Canada.
Small blue-gray Falcon.

2007-02-17 18:39:17 · 1 answers · asked by sanket 1 in Zoology

Im currently stationed in Okinawa, Japan where humidity gets up around 90% granted I survived last year, but it just really sucks. Us Cali guys just cant get used to this humidity thing. The Japanese law around here prohibits a/c use from Feb-Apr so the beq rooms have nothing for cooling. Any ideas to either reduce temperature, or reduce humidity aside from buying a dehumidifier?

2007-02-17 18:36:32 · 5 answers · asked by Anonymous in Weather

2007-02-17 18:35:33 · 5 answers · asked by Lisa V 3 in Weather

Ok this may sound like a silly question for people who have tried the seeds before, but wherever i look it tells you to scrape some fungus like substance off of the seeds before taking them... Now, looking at the seeds i have i dont really see any 'fungus-like' stuff on the surface, and i tried scraping one of the seeds to see if there was anything under it but im getting nothing... i cut the seed in half and there's another little seed inside that looks kind of like a tiny, peeled sunflower seed - is that what im supposed to use or what?

Any suggestions would be appreciated and please serious anwers only. thanks

2007-02-17 18:34:05 · 1 answers · asked by pb 2 in Botany

if yes can you give me some Info about this... Coz me and my friends were having a debate about this...

2007-02-17 18:32:06 · 1 answers · asked by VJPaz 1 in Astronomy & Space

the pen looks normal. simple metal tube but at the top right near the rim there are 3 marks a pen a pencil and a floppy disk showing the different points easy right well the pen changes its tip by the way you look at it looking shright at it simply holding it up right i'm at a lose just clicking down on it changes without you doing anything .

2007-02-17 18:29:09 · 2 answers · asked by geoff92382 1 in Engineering

I want to move :)

2007-02-17 18:28:45 · 3 answers · asked by ? 4 in Geography

strand suddenly mutated to an A(adenosine)??

2007-02-17 18:27:07 · 4 answers · asked by whoswhomwho 2 in Biology

y= ln (ln2x)

2007-02-17 18:26:07 · 10 answers · asked by conkfasi 2 in Mathematics

2007-02-17 18:25:06 · 3 answers · asked by ranu_pratap 1 in Engineering

hate math@!

2007-02-17 18:24:55 · 14 answers · asked by Tamekia Anderson 4 in Mathematics

2007-02-17 18:24:13 · 6 answers · asked by Anonymous in Biology

2007-02-17 18:18:52 · 1 answers · asked by Anonymous in Engineering

2007-02-17 18:17:55 · 5 answers · asked by tuxedo cat 6 in Astronomy & Space

thanks

2007-02-17 18:16:02 · 4 answers · asked by Anonymous in Mathematics

2007-02-17 18:15:35 · 6 answers · asked by nena 1 in Zoology

DESCRIBE THE PATHWAY OF MECHANISM BY WHICH WATER IS TRANSPORTED THROUGH A FLOWERING PLANT FROM THE SUN TO THE ATMOSPHERE.

2007-02-17 18:15:09 · 1 answers · asked by icey_sk8er 2 in Biology

2007-02-17 18:10:58 · 4 answers · asked by Giggly Giraffe 7 in Astronomy & Space

The voltage and current for an unidentified circuit element w/ 2 terminals are zero for t < 0. For t >/= 0 they are
v = 50 e^(-1600t) - 50 e^(-400t) Volts
i = 5 e^(-1600t) - 5 e^(-400t) Amps
How much energy is delivered to the circuit element between 0 and 625 microseconds?
Note: Current is flowing in the direction of a voltage drop.

Note that I'm to find the total energy over a specified period of time. I think I need to integrate over the interval 0 to 625 microseconds, but I tried that and I can't seem to get it right.

2007-02-17 18:09:00 · 3 answers · asked by Bill459 2 in Engineering

2007-02-17 18:03:21 · 1 answers · asked by GEORGE P 1 in Physics

2007-02-17 18:02:46 · 2 answers · asked by Nik Khamsani K 1 in Earth Sciences & Geology