Science & Mathematics - 5 December 2007

I know that insulators hold their valence electrons tightly, while conductors hold them loosely. But why? Is it because metals want to lose electrons, so they're held loosely?

2007-12-05 08:18:12 · 4 answers · asked by tobias 2 in Physics

a) The shape and function of a protein is determined by the sequence of amino acids along the chain

b) The sequence of amino acids that make up a protein are known as the tertiary structure of the protein

c) Although proteins are long and complex, they have a regular structure that results from hydrogen bondng

d) The primary structure of different protein molecules is created by hydrogen bonds between
an amine group on one molecule and a lone pair of electrons on an oxygen molecule in an adjacent protein

e) One type of tertiary structure found in proteins is α-helix

f) The structrure of a protein that results from only hydrogen bonding between the side
chains of the different amino acids is called the tertiary structure

2007-12-05 08:17:06 · 1 answers · asked by Anonymous in Chemistry

why is sugar a non-electrolyte?

2007-12-05 08:16:44 · 3 answers · asked by ~They call me MOMMY~ 6 in Chemistry

can two objects at the same temperature have the same amount of heat?

2007-12-05 08:15:22 · 14 answers · asked by Grace K 1 in Chemistry

The weight of a fish, y(t), satisfies the equation:

dy/dx + y = 3y^(2/3)

If the initial weight y(0) = 0, find its weight at any subsequent time.

Thank you so much if you can help :)

2007-12-05 08:15:19 · 1 answers · asked by Hayley* 3 in Mathematics

I know the answer is 2,4. But I need steps. I never expect any guesses. show me the steps plz.

2007-12-05 08:14:24 · 10 answers · asked by Hari 2 in Mathematics

i think i got it right, but im not sure... i got


1s^2
2s^2
1p^6
3s^2
2p^6
4s^2
3d^10
3p^6
5s^2
4d^10
4p^2


am i right??? if not where did i mess up??

2007-12-05 08:12:40 · 1 answers · asked by schs_gurrl 3 in Chemistry

Like if I told you what's 27 * 37 and gave you 2 minutes can you do it without pencil & paper?

2007-12-05 08:12:14 · 8 answers · asked by Adel 6 in Mathematics

Find dz/dy if z= (e^y + 1)/ (y+1)

2007-12-05 08:11:44 · 6 answers · asked by Anonymous in Mathematics

if some examples.

2007-12-05 08:11:15 · 3 answers · asked by zorgani1 1 in Chemistry

I live in Southern CA and I just picked this off of my neighbors tree. Its very hard and has pollen in the flower.

2007-12-05 08:10:14 · 1 answers · asked by Anonymous in Botany

This is the problem:
Describe an experiment using only hot and cold water that would allow you to verify that the heat capacity of your coffee cup calorimeter is about 10 J/C. Be Specific

2007-12-05 08:09:20 · 2 answers · asked by Anonymous in Chemistry

I Really need some help with this Question for my science fair project! please help!;}

2007-12-05 08:08:26 · 4 answers · asked by nemo 1 in Other - Science

Thanks :D

2007-12-05 08:08:14 · 9 answers · asked by WHAT THE HELL 4 in Mathematics

Amanda composed two songs. The longer song is 126 seconds less than twice the length of the short song. The longer song lasts 286 seconds. How long is the shorter song?

2007-12-05 08:05:49 · 5 answers · asked by kimchee_boi 3 in Mathematics

2007-12-05 08:05:36 · 4 answers · asked by Anonymous in Physics

Okay, I am a bit embarrassed, I am on the brink (have a D by 1 point, right before the final) of receiving an F in Organic Chemistry and I have honestly tried so hard to understand this class. I am at a really tough school and it is a known fact that our teacher tries to trick us on the test! I am not talking bad about him because I completely understand the importance of the subject. About a month ago, I came down with the worst virus that I've ever encountered. I am now feeling well, but at the time it enormously hindered my studying abilities. Also, I am taking Physics along with a Cell Biology class and have labs with every one. I know that I am in a hole and I will never give up on my goal to become a doctor one day, it's my dream. So, my question is with a F in Organic, is it impossible to get into Med or Dental school? Or, should I cut my losses? Thanks so much for any information!

2007-12-05 08:05:02 · 6 answers · asked by Anonymous in Medicine

What is at the bottom of the ocean? Have people let things reach it, like submarines? What do you think is down there?

2007-12-05 08:04:59 · 4 answers · asked by Anonymous in Earth Sciences & Geology

Please help..Thanks!!

2007-12-05 08:04:34 · 2 answers · asked by Anonymous in Zoology

Factor out the GCF(Greatest Common Factor) from the given polynomial 12c^2d^5 + 15c^8d^4 (^# means to the power) so its 12c(little 2)d(little5) + 15c(little 8)d(little4) sorry kinda confusing without being able to type the problem normally lol

2007-12-05 08:03:12 · 2 answers · asked by Chuck D 1 in Mathematics

Calculate the number of molecules in m= 29 g of a substance , molar mass M= 63 g/mol. Express your result in scientific notation with 3 sig. fig. i.e. x.yzEw

2007-12-05 08:00:26 · 1 answers · asked by Talal B 1 in Physics

I think its 2n squared but i need help becuase im not sure ( exmplain clearly if you could please)

2007-12-05 07:59:51 · 3 answers · asked by Anonymous in Mathematics

for Orlando,Florida from Dec. 14-20?

2007-12-05 07:57:47 · 1 answers · asked by blondestrawberry 2 in Weather

give reasons please

2007-12-05 07:57:04 · 10 answers · asked by funkybass4ever! 5 in Astronomy & Space

2007-12-05 07:54:52 · 8 answers · asked by Anonymous in Mathematics

If we observe a galaxy at 40 billion light years distance can we say that light given off by that same galaxy today will take 40 billion years to reach us? Assuming it hasnt "moved"? basically I am asking if distance has always been constant given that space itself has "expanded." More fundamentally I am asking if when the universe was "smaller" (ie. less expanded) then was the a light year of long ago the same as a light year today.

2007-12-05 07:52:42 · 5 answers · asked by silversides27 2 in Astronomy & Space

2007-12-05 07:51:36 · 2 answers · asked by hottiechck7 1 in Mathematics

(1) 8 - 4 + 2 - ...

(2) 1+ 1.5 + 2.25 + ...

2007-12-05 07:48:54 · 3 answers · asked by Anonymous in Mathematics

i am a high school student, top of my class in maths...atm we are doing trig and so on but i would be interested in learning the methods for or how to do calculus...e.g what notation do i need to learn...any helpful sites or just anything to help advice...theorems would be appreciated

2007-12-05 07:47:46 · 1 answers · asked by Dovey...x 3 in Mathematics

im taking AP enviromental science and i need to multiply 4 fruit flies in a container in a very short amount of time. if i get over 300 by the end of the week i can get a A out of the class for quarter. please help. oh and no i cant put fruit in there.

2007-12-05 07:45:59 · 1 answers · asked by Connor S 1 in Other - Science