Science & Mathematics - 4 January 2007

when a degradable plastic decays, the starch or cellulose backbone may break down completely into carbon dioxide, water and organic matter.

a)what happens to the F, Cl, or heteroatom groups on the plymer chains as the backbone decays
b)why might this be a problem?

2007-01-04 06:03:34 · 1 answers · asked by bubbles89 1 in Chemistry

This seems to me to be a stumbling block for the theory, something that I've not heard a good explanation for in scientific terms. What is the "official" evolutionist explanation for it? Just curious, not trying to bash here.

Thanks.

2007-01-04 06:00:29 · 5 answers · asked by Open Heart Searchery 7 in Biology

2007-01-04 06:00:07 · 1 answers · asked by Steenskees 2 in Biology

I was wondering how you can tell the difference between polar and nonpolar molecules by looking at the molecular formula....
so i guess im asking, by looking at a molecular formula how can you tell whether the substance is polar..then nonpolar...and i need to list 4 categories with some examples..please help me out:)

2007-01-04 05:59:55 · 5 answers · asked by Anonymous in Chemistry

does this create a white powder?

2007-01-04 05:58:57 · 4 answers · asked by chattdude43 2 in Chemistry

what is the number that its half and its quarter and its 1/3 ,and its 1/5 ,and its 1/6 , and its 1/8 and 1/9 is an integer ......

2007-01-04 05:57:34 · 8 answers · asked by Anonymous in Mathematics

(a) An equation of the line of symmetry of pentagon RSTUV is x =

b) The area of triangle RVS is __ square units.

(c) The area of trapezoid STUV is __ square units.

(d) The area of pentagon RSTUV is __ square units.

2007-01-04 05:53:48 · 1 answers · asked by Anonymous in Mathematics

2007-01-04 05:47:44 · 1 answers · asked by karbasi123 1 in Physics

Does anyone known when it will snow (In England)?
Hey I'm a poet and I didn't know it!

2007-01-04 05:46:30 · 12 answers · asked by rozzywozzy 2 in Weather

I really enjoyed the McLaughlin Planetarium as a kid and I'd like to give my kids the same experience.

2007-01-04 05:46:16 · 3 answers · asked by philz4jc 1 in Other - Science

I want to know what evolutionists believe to be the best answer they have for the evolution of life. How do they believe non-living materials became living?
Convince me your right.
I dare you.

2007-01-04 05:45:18 · 7 answers · asked by Anonymous in Biology

I really just need a reminder of what the lines mean. I seem to recall that it has something to do with absolute value? If anyone can fill in the blanks, I would really appreciate it. Thanks

2007-01-04 05:44:06 · 11 answers · asked by car 3 in Mathematics

2007-01-04 05:43:17 · 4 answers · asked by Anonymous in Physics

2007-01-04 05:40:58 · 11 answers · asked by Anonymous in Astronomy & Space

2007-01-04 05:36:33 · 21 answers · asked by Anonymous in Botany

2007-01-04 05:34:12 · 6 answers · asked by luke l 1 in Physics

[urgent] Integration - rewriting...
Please visit http://www.babycat.net/private/q1b.gif

2007-01-04 05:33:50 · 4 answers · asked by priereca 1 in Mathematics

2007-01-04 05:31:16 · 18 answers · asked by caroleannelane 1 in Geography

AB is parrallel to AC
AB is perpendicular to AC
Ab is greater that BC
BC is perpendicular to CA

2007-01-04 05:29:25 · 6 answers · asked by Anonymous in Mathematics

My calculater doesnt work

2007-01-04 05:24:28 · 22 answers · asked by Anonymous in Mathematics

To measure the static friction coefficient between a 2.0-kg block and a vertical wall, the setup shown in the drawing is used. A spring (spring constant = 475N/m) is attached to the block. Someone pushes on the end of the spring in a direction perpendicular to the wall until the block does not slip downward. If the spring in such a setup is compressed by 0.049m, what is the coefficient of static friction?

2007-01-04 05:22:24 · 2 answers · asked by Anonymous in Physics

2007-01-04 05:18:28 · 3 answers · asked by rathan b 1 in Biology

2007-01-04 05:17:05 · 14 answers · asked by munavar 1 in Astronomy & Space

2007-01-04 05:14:58 · 16 answers · asked by ☺ Joel ☺ 1 in Weather

first y silver sulphate is soluble in dil nitric acid..
second why silver thiosulphate is soluble in excess thiosulphate
third no ppt is formed when bacl2 reacts with sulphides
fourth why white ppt of baso3 sol in dil hcl on warming with h2o2 the ppt is oxidized to baso4
fifth y baso4 is insoluble in dil hcl
sixth why no ppt formed when thiosulphate reacts with bacl2 except from concentrated solutions...
seventh y red colour of fe2so3 turns reddish brown on boiling?
eight y purple colour of complex ferric thiosulphate fades rapidly and disappears by boiling
ninth decoulirization of iodine occurs when reaction of iodine with sulphide,sulphite,thiosulphate yet -ve with sulphate
tenth same ninth question if reaction with dichromate or permengante

IF NO ONE KNOWS THE ANSWER JUST CAN U TELL ME A WEBSITE...OR IF U HAVE VOGEL'S PRACTICAL CHEMISTRY TEXT BOOK THE ANSWERS R THERE

2007-01-04 05:14:52 · 2 answers · asked by caramella 1 in Chemistry

I'm going to find out the information on how to do this properly so that I don't poison myself.

2007-01-04 05:14:03 · 1 answers · asked by lord_andys_new_id 1 in Chemistry

2007-01-04 05:13:34 · 15 answers · asked by munavar 1 in Zoology

2007-01-04 05:10:31 · 4 answers · asked by TeaPea 1 in Biology

I was thinking that one of the main reasons why air has such a high resistance to electric flow is because its molecules are so far apart (gas), but what if you were to compress it with alot of pressure?

Also while still on the topic of current running through air, once you get arcing to occur through the air, does the resistance dramatically decrease?...like if it takes 1kV to get an electric arc over an inch of air, once you get the arc, could you lower the voltage and still have the arc exist. If yes, by how much?

2007-01-04 05:10:22 · 6 answers · asked by carrotstien 2 in Physics

2007-01-04 05:09:14 · 6 answers · asked by STFU Dude 6 in Medicine