Science & Mathematics - 16 January 2007

does anyone know how many mountain ranges there re in the world? thankss!

2007-01-16 11:54:39 · 6 answers · asked by roxychik 1 in Geography

11/14 - (-16/21)

I know how to do this problem and all the steps but when i constructed it i keep on getting it wrong!

2007-01-16 11:52:36 · 15 answers · asked by ashley_tisdale2006 2 in Mathematics

an elevator can hold 20 people of 75 kg. The elevator has a mass of 500 kg. the maximum force the elevator can withstand is 29,6000N. What is the greatest acceleration the elevator's motor can produce without breaking the cable?

2007-01-16 11:51:54 · 3 answers · asked by will p 1 in Mathematics

2007-01-16 11:51:54 · 6 answers · asked by Eric M 1 in Mathematics

2007-01-16 11:50:38 · 12 answers · asked by ? 6 in Geography

I want to do cryogenics for my science fair project, and I found this on the internet.

2007-01-16 11:48:54 · 5 answers · asked by princess49872001 1 in Chemistry

2007-01-16 11:48:51 · 8 answers · asked by Anonymous in Mathematics

2007-01-16 11:48:42 · 1 answers · asked by Shari K 1 in Mathematics

2007-01-16 11:47:31 · 12 answers · asked by Anonymous in Mathematics

Any specific factors that change the pH of saliva?
Such as foods recently consumed and the like...?

2007-01-16 11:46:44 · 3 answers · asked by raxer 2 in Chemistry

Investigation and Experimentaion
Biology

2007-01-16 11:45:27 · 4 answers · asked by Anonymous in Biology

my world history teacher told me that it was probably incorrect, but the mayans were right about almost all of the celestial occurances that happened that they had predicted.

2007-01-16 11:45:24 · 5 answers · asked by MORG225 2 in Astronomy & Space

For instance, a list that contains every scientific genus & species name such as....Genus names--Drosophila, Homo, Pisum, etc........and Species names--H. sapiens, E. coli, etc.

I was just naming a few names above just for example so that you would know what I meant by it.

2007-01-16 11:45:22 · 3 answers · asked by KiKi 1 in Biology

Could anyone please recommend me a website that makes accurate weather reports?

2007-01-16 11:43:23 · 8 answers · asked by Anonymous in Weather

2007-01-16 11:42:22 · 5 answers · asked by AAA 1 in Astronomy & Space

2007-01-16 11:42:06 · 12 answers · asked by Anonymous in Astronomy & Space

2007-01-16 11:39:44 · 8 answers · asked by Anonymous in Chemistry

I need help on this QU. thats why I am asking>

2007-01-16 11:38:36 · 4 answers · asked by jannetta c 1 in Weather

Thanks for helping on the last one, now could someone help me with this one? Simplify

2007-01-16 11:37:28 · 13 answers · asked by Adriane 2 in Mathematics

Be happy with the basic principle, but delighted with details (locomotion, diving-bell idea, etc.) Howsit work?

2007-01-16 11:37:21 · 7 answers · asked by Skeff 6 in Zoology

"Ammonia is produced to sell as a fertilizer. Nitrogen from the atmosphere reacts with hydrogen gas to form gaseous ammonia at STP conditions. You must produce 1500 L of NH3 per month and the reaction process is 88% efficient. How many L of hydrogen gas must be purchased to meet the 1500 L quota?"

I can't seem to get the right answer...

2007-01-16 11:36:36 · 1 answers · asked by saira n 1 in Chemistry

Show all your work. I like equations.

2007-01-16 11:35:15 · 7 answers · asked by Cutie 4 in Mathematics

Fill the drinking glass with water up to the brim.

Place the cardboard on top of the glass and hold it down. Some extra water may escape.

Hold the cardboard against the glass with your fingers and turn the glass over.

Carefully remove your fingers.

You should be surprised and amazed by this strange occurrence.

Repeat the experiment with a new piece of cardboard and only one inch of water in the glass.

Could someone explain to me why the water stays in the glass? I don't have to know the answer to this question just yet but I read two different explanations that are probably saying the same thing...but they sound different to me

Ex. #1: The water stays in the glass because the pressure of the air outside the glass is greater than the pressure of the water against the cardboard.

Ex. #2: When you turned the glass upside-down, a small amount of water dribbled out without any air bubbling back in. Gravity was pulling down on the water and the water was pulling down on the air inside the glass. But being a gas, the air inside the glass spread out more. That meant the air molecules inside the glass weren't pressing against each other as hard as they were before. The air outside the glass, on the other hand, was pressing in on the cardboard just as hard as it ever was. And that difference in air pressure was enough to actually suspend the water in mid-air, with nothing more than air pressure keeping it from escaping.

2007-01-16 11:31:48 · 1 answers · asked by princess 1 in Chemistry

How would you solve this if b=a^2

2007-01-16 11:30:54 · 2 answers · asked by kusbetts 2 in Mathematics

2007-01-16 11:30:40 · 4 answers · asked by Anonymous in Chemistry

it has been rumored to me that if for some reason my nipple got cut off or otherwise detatched it would regrow???
anyone that can find proff on wether this is fact or not will be thanked...alot...
anyone??
links please!!

2007-01-16 11:30:38 · 34 answers · asked by Anonymous in Biology

If the kinetic energy of a 0.62kg stone is 2.3J at its highest point and 9.4J at its lowest point how do I calculate the height at the highest point.

2007-01-16 11:28:09 · 5 answers · asked by mr.puss 1 in Physics

a.a forest reduced to ash by an intense fire.
b.a newly formed volcanic island.
c.any environment that can be reached by wind-blown seeds that cross oceans.
d.a weed-ridden,abandoned corn field

2007-01-16 11:27:55 · 1 answers · asked by rita c 1 in Biology

write y-7=2(x+3) in standard form.

2007-01-16 11:27:51 · 7 answers · asked by nUNCAdElosNUnCASdELosJamasES! 1 in Mathematics

2007-01-16 11:27:26 · 4 answers · asked by Alexander P 2 in Mathematics