Science & Mathematics - 18 December 2006

I've just been wondering how it all works. Does it have something to do with the molecules in the air speeding up or slowing down? I think that it's the suns distance that has an effect on it, but what does it have an effect on exactly?

2006-12-18 14:11:58 · 7 answers · asked by The best Me there is!!! 2 in Weather

How do I convert the left side to be equal with the right,,,,,

2006-12-18 14:10:26 · 5 answers · asked by Anonymous in Mathematics

I saw a guy this weekend at a dinner party, take a spoon and butter knife and pick them up, as though they were magnetic. How did he do it? He held the knife and stuck it to the spoon and picked up the spoon w/ the end of the knife.

2006-12-18 14:09:49 · 1 answers · asked by Anonymous in Other - Science

there is a theory telling that we can draw N perpendicular lines such that no lines parallel to each other.
how it could possible?? what happens to its imaginary line??

2006-12-18 14:09:39 · 5 answers · asked by Anonymous in Mathematics

Lactose is a sugar found in milk and it is made up of carbon, hydrogen, and oxygen. A 100g sample of lactose produced 154.3 g of carbon dioxide and 57.91g of water when analyzed by combustion analysis.
a)How many moles of carbon were present in the 100 g sample?
b)How many moles of hydrogen were present in the 100 g sample?
c)What is the mass percent of carbon in lactose?
d)What is the mass percent of hydrogen in lactose?
e)What is the mass percent of oxygen in lactose?

2006-12-18 14:09:35 · 2 answers · asked by chemistrystudentinneed 1 in Chemistry

I'd thank you so much if you showed your work.

2006-12-18 14:09:27 · 14 answers · asked by n a n a. 2 in Mathematics

For instance it is well known that the products of a complete combustion of a hydrocarbon must be carbon dioxide and water, and since soot is neither the residue caused by the combustion process must be a hydrocarbon right, but then why don't we burn soot, why do we just throw it away, or am I wrong, I hope someone can clear this up for me.

2006-12-18 14:09:01 · 4 answers · asked by Anonymous in Chemistry

Sodium peroxide is sometimes used in emergency breathing devices on submarines since that compound will react with carbon dioxide to produce oxygen and sodium carbonate. Answer the following questions if we assume that one person produces about 10.0 moles of carbon dioxide to produce oxygen and sodium carbonate. Answer the following questions if we assume that one person produces about 10.0 moles of carbon dioxide in a 24 hour period.
a) How many moles of oxygen are produced per day for one person who requires the emergency breathing device?
b) How many grams of sodium peroxide are required to remove 10.0 moles of carbon dioxide?

2006-12-18 14:06:39 · 2 answers · asked by chemistrystudentinneed 1 in Chemistry

1 - Hsubscript2O
2 - H subscript2S
3 - Hsubscript2Se
4 - Hsubscript2Te

2006-12-18 14:04:01 · 2 answers · asked by Beth 1 in Chemistry

2006-12-18 14:03:36 · 2 answers · asked by mascga3 1 in Mathematics

great common factor of 479

2006-12-18 14:00:03 · 6 answers · asked by lava511@sbcglobal.net 2 in Mathematics

Billions of things make is possible for life on Earth. If not temperature, atmosphere, environment etc. Is it just coincidence that we can live so comfortably on this planet?

2006-12-18 13:58:47 · 19 answers · asked by Link 4 in Astronomy & Space

Follow this link:
http://www.cwu.edu/~cots/images/periodic_table.jpg
In the periodic table, what color representse each one (Metal, Non-metal, metalloid)?
To what category does Mercury belong to?

2006-12-18 13:57:40 · 4 answers · asked by R B 3 in Chemistry

Given that (97/19)= w+ (1/(x+(1/y))), if w, x, and y are all positive, find the value of w+x+y?

2006-12-18 13:56:12 · 4 answers · asked by mascga3 1 in Mathematics

what kind of volcano?......what kind of lava does it have?,...

2006-12-18 13:56:02 · 5 answers · asked by flutegirl101 2 in Earth Sciences & Geology

A restaurant has a menu with five appetizers, seven entrees, and four desserts. Find the number of ways a customer can order an appetizer, entree, and dessert.

Thanks for the help.

2006-12-18 13:54:25 · 3 answers · asked by jakesly 1 in Mathematics

2006-12-18 13:52:57 · 4 answers · asked by Lim S 3 in Botany

I recall my brother mentioning in Changi Airport, Singapore, they have something like a room with a high percentage of oxygen. Everyone relaxes and smiles etc. My Chemistry teacher also confirmed this one day. How exactly does a high concentration of oxygen in the air you breathe make you happier?

2006-12-18 13:52:32 · 2 answers · asked by Link 4 in Chemistry

A. Are parasites
B. Have a true nucleus
C. Move toward the light
D. Use flagella to move

2006-12-18 13:49:04 · 7 answers · asked by Chloe S 1 in Biology

2006-12-18 13:48:05 · 1 answers · asked by thomasgraham880 1 in Mathematics

tell me does it stay the same?

2006-12-18 13:47:41 · 7 answers · asked by andrew 3 in Chemistry

http://capa.chem.sunysb.edu/nan/diser.jpg

The molecule above is one of the products of the condensation reaction of
glycine and _________ . The other prouct being water.

2006-12-18 13:46:03 · 1 answers · asked by Andrew C 1 in Chemistry

need to brush up on my algebra for a simple test, forgot how.

2006-12-18 13:45:26 · 3 answers · asked by Thaddeus G 1 in Mathematics

can you give me a brief description of each product?:
MgO
CuO
Ca(OH)2
ZnCl2 + H2
ZnSO4 + Cu
Cu(NO3)2 + Ag
Ca(OH)2 + H2
AgCl + NaNO3
Al(OH)3 + NH4Cl

2006-12-18 13:44:40 · 1 answers · asked by Anonymous in Chemistry

im so confused with language.
a/b '/' should be a vertical line. this means a is divisible by b,b is a mutiple of a. so 5/20 ,5/355 they are called 5 is divisible by 20. but can this work 20/5. 20 is divisible by 5? and this 15/18 ? because 15 and 18 have the same factor 3.
more examples would be appreciated
cheers

2006-12-18 13:41:00 · 2 answers · asked by Anonymous in Mathematics

2006-12-18 13:39:32 · 2 answers · asked by me i guess 1 in Zoology

1 covalent
2 ionic
3 hydrogen
4 metallic

2006-12-18 13:38:20 · 2 answers · asked by Anonymous in Chemistry

2006-12-18 13:38:11 · 9 answers · asked by Dominic R 2 in Zoology

2006-12-18 13:35:05 · 2 answers · asked by me i guess 1 in Zoology

x^2+5x+6

2006-12-18 13:34:15 · 6 answers · asked by Nowhere Man 6 in Mathematics