Science & Mathematics - 18 November 2007

a helium -filled weather balloon is launched from the ground where the pressure is 752mmHg and the temperature is 21c. Under these conditions its volume is 75.0 L. When it has climbed to an altitude where the pressure is 89mmHg and temperature is 0c, what is it's volume. I get 8.24, but I think I am incorrect, can someone lend a hand.

2007-11-18 21:23:58 · 4 answers · asked by dannchris@sbcglobal.net 1 in Engineering

2007-11-18 21:20:08 · 5 answers · asked by Sonia J 1 in Geography

2007-11-18 21:17:55 · 6 answers · asked by bravo 2 in Physics

2007-11-18 20:54:05 · 1 answers · asked by Anonymous in Chemistry

weather question!!

2007-11-18 20:51:14 · 4 answers · asked by kxkx 2 in Weather

Did you know that a scientist set fire to salt-water and has possibly found way a to end the energy crisis?
Check out these articles below.

http://youtube.com/watch?v=hyn9z4vKcZI
http://www.cnn.com/2007/TECH/science/11/14/saltwater.fire/index.html

Has that process ever had money towards research put into it? Salt water is the most abundant resource on the planet. This could end the oil crisis.Has it been fully researched? Do microwaves really require that much energy? Would it be possible to do with a home microwave and an internal source of ignition? I know the method mentioned is a recent discovery according to the article but, I learned through a previous question this method has been around for years. Someone mentioned that the process required more initial energy than it produced, but if it also produces drinkable water, would the combined benefits on the world scale outweigh the increased drain on energy resources?

2007-11-18 20:46:56 · 5 answers · asked by wsdmskr825 2 in Earth Sciences & Geology

2007-11-18 20:46:16 · 3 answers · asked by Anonymous in Astronomy & Space

Look here
http://hotpoint-ariston.i.ua/show/600781/

2007-11-18 20:39:17 · 16 answers · asked by Anonymous in Paranormal Phenomena

2007-11-18 20:34:10 · 2 answers · asked by alborz a 1 in Mathematics

On its banner the other day Yahoo threw bouquets at Alexis Lemaire for a new world record in calculating the 13th root of a 200 digit number in 72 secs. With a computer.
In 1977, Shakuntala Devi extracted the 23rd root of a 201 digit number mentally. In 1980 she mentally multiplied two 13 digit numbers in 28 secs. Her answer was 18, 947, 668, 177, 995, 426, 462, 773, 730.

2007-11-18 20:29:43 · 2 answers · asked by virtrava 3 in Mathematics

My geography/histoy teacher has arguments with the class about the world is round or flat...........is there anyway that we could convince her that the world is round?

2007-11-18 20:26:42 · 16 answers · asked by Anonymous in Geography

How it came to b in used in all meansuration calculations??y its value id fixed?

2007-11-18 20:20:28 · 13 answers · asked by Anonymous in Mathematics

heyy everyone!!! HOW DO U CHANGE A DECIMAL INTO A FRACTION???????

2007-11-18 20:12:59 · 5 answers · asked by Anonymous in Mathematics

An approximate formula would be fine.

2007-11-18 20:06:19 · 5 answers · asked by Anonymous in Weather

The atmosphere in Jupiter is very deep, perhaps comprising the whole planet, and is somewhat like the Sun. It is composed mainly of hydrogen and helium, with small amounts of methane, ammonia, water vapor and other compounds. At great depths within Jupiter, the pressure is so great that the hydrogen atoms are broken up and the electrons are freed so that the resulting atoms consist of bare protons. This produces a state in which the hydrogen becomes metallic. If there was an atomic "starter" could that create a new star with limited fuel

2007-11-18 19:59:04 · 10 answers · asked by Anonymous in Astronomy & Space

Strange things happen at my house. When I am near lights, they stop working right when I need them to come on,I sometimes wakeup with weird scratches on me, all of my family hears weird things in the house, have seen things move etc... Really odd stuff. There are 2 teenages in the house, maybe a poltergeist? We've talked to alot of people who moved from our town because their house was haunted, what do you think?
Please, this is a serious question, no sarcastic/rude answers....

2007-11-18 19:56:29 · 17 answers · asked by invalid chromosome 2 in Paranormal Phenomena

It's just how it sounds. What is the term for someone dreaming about some physical object and waking up with it in their hands and they never had it before of course!

2007-11-18 19:52:00 · 12 answers · asked by jaime 3 in Other - Alternative

2007-11-18 19:47:50 · 5 answers · asked by pumpmar 2 in Other - Alternative

i am an architecture student, and i am creating a plan of a zoo, but i have less information & ideas about planning the exhibit area of a certain animal, i already visited our state zoo to gather some datas but the datas i acquired are very insufficient...what i need know are this ff. questions.

1.is it neccessary that the holding area of a certain animal must be adjacent to its exhibit area?

2.what are the general contents of an animal holding area?(either mammals avians or reptiles),

3.what is the specific function of the zookeeper's working area?

4.do the food of a certain animal should be stored somehwere on the holding area?, or do zoo have a general or main storage area for all their animal foods?

5. how can i zookeeper transfer a certain animal specially dangerous animals (like tigers) from the holding area to the exhibit area without being harmed by the animal?

I know only Zoo personnels can answer this, and pls answer them in details!,thnks!

2007-11-18 19:33:50 · 3 answers · asked by alpha 1 in Zoology

Next year i'll begin medicine and i was hoping for some advise, hints and tips from people who have already been there to make my life a little easier. Advise such as what is the most important part of medical school and how i should be studying to keep my grades up would be great, really anything helpful will be greatly appreciated :-)

Thanks.
14 minutes ago - 3 days left to answer.

2007-11-18 19:26:37 · 5 answers · asked by Mujaahid 3 in Medicine

At 25°C, gaseous SO2Cl2 decomposes to SO2(g) and Cl2(g) to the extent that 12.5% of the original SO2Cl2 (by moles) has decomposed to reach equilibrium. The total pressure (at equilibrium) is 0.900 atm. Calculate the value of Kp for this system. ---I keep gettinng the wrong answer on this one. What are you getting?

2007-11-18 19:25:58 · 3 answers · asked by jazzyrhythms 3 in Chemistry

Could I stand on top of the water without sinking?

2007-11-18 19:24:09 · 15 answers · asked by Anonymous in Physics

Say I weigh 200 pounds.

2007-11-18 19:14:50 · 12 answers · asked by Anonymous in Physics

2007-11-18 19:01:48 · 3 answers · asked by viene_katherine 1 in Biology

2007-11-18 18:58:41 · 5 answers · asked by Anonymous in Earth Sciences & Geology

is saying x is directly propotional to y the same as saying x=y?

2007-11-18 18:48:26 · 4 answers · asked by Omar 1 in Mathematics

2007-11-18 18:46:59 · 4 answers · asked by generalche22 3 in Chemistry

2007-11-18 18:42:14 · 3 answers · asked by -michelle- c 1 in Physics

Okay so here's how it's going down:
I need to know how to split a single pentagon into five congruent parts in three different ways.
I also need to know how to split a hexagon into six congruent parts in three different ways.
I'm screwed if I don't find out soon so....
Thanks so much all you mathies!!! I really respect you!

2007-11-18 18:40:59 · 3 answers · asked by Anonymous in Mathematics

2007-11-18 18:39:33 · 4 answers · asked by Kayleigh 3 in Geography