Science & Mathematics - 30 October 2006

2006-10-30 11:20:22 · 4 answers · asked by tom l 3 in Geography

help

2006-10-30 11:18:33 · 7 answers · asked by Anonymous in Mathematics

can some one help me

2006-10-30 11:18:15 · 2 answers · asked by Anonymous in Mathematics

2006-10-30 11:17:25 · 10 answers · asked by braunstein12 1 in Mathematics

ok, i'm confused.

here's the question:

Find the y-coordinate of the midpoint of segment MN with endpoints M (-2,6) and N (8,0).

there is like no picture whatsoever. i'm really confused.

Help! :)

2006-10-30 11:16:56 · 7 answers · asked by Anonymous in Mathematics

2006-10-30 11:15:40 · 3 answers · asked by sarcastro1976 5 in Zoology

can any one explain the empirical formula tome? i dont get it at all...heres the question ihave to answer: the empirical formula of a compound is CH4 (the four is subscript). the molecular formula of the compound could be: CH4, C2H6,C3H8, or C4H10....help!!!

2006-10-30 11:09:37 · 3 answers · asked by Ally 2 in Mathematics

2006-10-30 11:07:25 · 5 answers · asked by jonathon t 1 in Medicine

In Mechanical engineering contexts

2006-10-30 11:05:51 · 4 answers · asked by Akinbiyi B 1 in Engineering

such as glucose, water, NaCl, KOH, ect...
if not, can someone help me how to determine their color??


-----------------
For those who knows these color, can you answer?
H2SO4 (sulfuric acid)
KOH (potassium hydroxide)
AgNO3 (silver (1) nitrate)
Sr(NO3)2 (strontium nitrate)
CH3 COOH (acetate)
NaOH (sodium hydroxide)
HCl (hydrochloric acid)
H2O (water)
NaCl (sodium chloride)
CuSO4 (copper (||) sulfate)
C6H12O6 (glucose)

2006-10-30 11:05:49 · 1 answers · asked by gogogo 3 in Chemistry

I have used TLC to separate plant pigments - what other biological compounds can be separated by this method though? Is its main use for the separation of proteins?
My books give information on the method but very little on the uses.

Also, does anyone know if there is any other method of separating pigments. - I don't need lots of detail - just a name so that I can look it up.

Thankyou!

2006-10-30 11:05:21 · 2 answers · asked by jane 62 1 in Chemistry

Starting from the mRNA encoding, describe where the protein is synthesized, the mechanism of assembly and modification from the newly synthesized protein to the mature protein and the route that the newly synthesized protein travels from the site of synthesis to its ultimate secretion from the cell. (the specific protein is a dimer of two polypeptides held together with a disulfide bond. it is also glycosylated.)

2006-10-30 11:05:13 · 1 answers · asked by joanie 1 in Biology

2006-10-30 11:04:40 · 3 answers · asked by Anonymous in Biology

2006-10-30 11:04:30 · 3 answers · asked by Trew 2 in Engineering

if there are any aries out there e-mail me i need a report on what we really think about other people getting on our last nerve.

2006-10-30 11:02:47 · 2 answers · asked by Thick~Chick 2 in Astronomy & Space

Both NaCl and CaO crystallize in the same lattice structure. Account for the following: The melting point of CaO is 2899°C while that of NaCl is 800°C. Mark all of the following that contribute to this difference in melting points.

Calcium ion has a larger charge than sodium ion.
The ionic radius of chloride ion is larger than an oxide ion.
NaCl has a higher molar mass than does CaO.
Oxide ion has a larger charge than chloride ion.
Calcium ions and sodium ions have similar ionic radii.

i think its the 1st 2nd and 4th but im not sure

2006-10-30 11:02:30 · 0 answers · asked by Anonymous in Chemistry

What is the hybridization of nitrogen in the following molecules?

H3CNC

2006-10-30 11:01:44 · 2 answers · asked by Anonymous in Chemistry

Find both the complement and supplement of each angle measure.: (y+20)degrees

2006-10-30 10:59:51 · 4 answers · asked by Mya G 1 in Mathematics

2006-10-30 10:59:39 · 3 answers · asked by sue h 1 in Mathematics

according to the U.S. census, one-third of all businesses are owned by women. If we select 25 businesses at random, what is the probability that 10 or more of them are owned by women?

2006-10-30 10:58:45 · 2 answers · asked by Cat J 1 in Mathematics

2006-10-30 10:55:23 · 2 answers · asked by Anonymous in Zoology

if the water from the ocean is from rain how dose it turn salty?

2006-10-30 10:54:22 · 3 answers · asked by dnn_draper 1 in Earth Sciences & Geology

NOT MANY PEOPLE CAN DO THIS TEST! CAN U? THE FIRST PERSON TO DO THIS GETS 10 POINTS ( THE ANSWERS HAVE TO BE CORRECT)

1. 24.882 DIVIDED BY 7.54
2. 806.4 DIVIDED BY 12.6
3. 6.734 DIVIDED BY 0.91
4. 81.75 DIVIDED BY 10.9
5. 0.3335 DIVIDED BY 2.9
6. 64.296 DIVIDED BY 0.18
7. 84.87 DIVIDED BY 12.3
8. 53.244 DIVIDED BY 8.7


WHOEVER DOES THIS CORRECTLY FIRST GETS 10 POINTS!!! =]

2006-10-30 10:53:29 · 17 answers · asked by x0x0_jay_x0x0 1 in Mathematics

2006-10-30 10:51:55 · 4 answers · asked by scittyboy98 1 in Geography

I know one is 180 degrees and the other is 90 degrees but I don't know which is which.

2006-10-30 10:50:28 · 7 answers · asked by Mya G 1 in Mathematics

I am not sure how to find the empiracal and molecular formuala for the following problem:

A common acid is an important chemical used in the manufacture of polyesters and plasticizers. It contains only C, H, and O. Combustion of 19.81 mg of the acid produces 41.88 mg CO(2) and 6.45 mg H(2)O. The molar mass of the acid is 166 g/mol.

2006-10-30 10:48:38 · 1 answers · asked by ink_spell_020 1 in Chemistry

2006-10-30 10:48:17 · 14 answers · asked by jenny s 1 in Mathematics

plz help what does x equal????

2006-10-30 10:47:22 · 10 answers · asked by Anonymous in Mathematics

2006-10-30 10:45:58 · 6 answers · asked by pmrider5252 1 in Geography

What is the strangest animal? (Humans Excluded)

2006-10-30 10:45:37 · 16 answers · asked by Anonymous in Zoology