Science & Mathematics - 18 October 2006

Compare and contrast n-type semiconductors with p-type semiconductors.
A.
B.
C.

2006-10-18 15:46:30 · 3 answers · asked by xxgodsgift2youxx 1 in Physics

would have?

Note: I'm not talking about the clocks we use, but the system of hours, minutes and seconds.

2006-10-18 15:46:11 · 7 answers · asked by lost in space 6 in Astronomy & Space

How does cell division and enlargement lead to growth in plants?

2006-10-18 15:44:47 · 1 answers · asked by Anonymous in Biology

There are no about 3300 different languages. These are derived from one original language, which develops into 1.5 languages every 6000 years. How long ago was the first original language spoken?
I don't understand how to start this problem!! please help

2006-10-18 15:44:04 · 4 answers · asked by DaniLynn 3 in Mathematics

a week or two ago i needed help with my homework and so i went online to look up a multistep equation calculator[so that i does the work for you] and now i cant find that site again. so can u please help me find a website where it can figure out the answers for me. like i type in an equation and its naswers it. thanks :]

2006-10-18 15:42:30 · 5 answers · asked by CutesyGirl<3 3 in Mathematics

Any help would be greatly appreciated. Thank you!

2006-10-18 15:41:14 · 3 answers · asked by Blackcat 2 in Chemistry

Hello, I am a first time poster, and I need to confirm the answers that my older brother gave me for the following questions. thanks

1. The melting point of water is 0 oC. Is water a liquid or a solid at -20 oC? Why?

2. The melting point of fluorine, F2, is -220 oC and the melting point of chlorine, Cl2, is -103 oC. Will the melting point of bromine, Br2, be higher or lower than that of chlorine? Why?

2006-10-18 15:40:29 · 3 answers · asked by harvardfootball54 1 in Chemistry

and the mother is white. i think its the same case for black and white too. (This is when the child is a girl) It seems like the child inherits the shape of the head from it's mother which is more round and with a flatter face generally for asians, so when its an asian father, the child gets its mother's white genes but with a cleaner cut appearance overall. I'm not trying to stereotype, this is just my observation. Like the kid could have blonde hair and blue eyes, but something about it still looks a little asian, and its a nice combo. I think asians have cleaner looking skin complexions or something, and the shape of the eyes too just looks cleaner, idk a better way to explain it. But when the mother is asian and the father is white, the kid kind of just looks like an american body type with an asian head and face, its not quite as nice. I'm not really familiar with genetics? Is there anything to back up my observation or debunk it? any thoughts? anybody else notice that?

2006-10-18 15:38:46 · 4 answers · asked by mwells0629 1 in Biology

You are to walk across a high wire strung horizontally between two buildings 10.0m apart. The sag in the high wire when you are at the mid-point should not exceed 10°. If your mass is 50.0 kg what must be the tension in the rope?

2006-10-18 15:36:48 · 1 answers · asked by 3ajeeba_q8 2 in Physics

An ac circuit is rated 240 v.What is the maximum voltage?For an appliance in an ac circuit of maximum current of 2 amps,what is the effective current?

2006-10-18 15:35:02 · 5 answers · asked by xxgodsgift2youxx 1 in Physics

why is it so freakin cold outside?...god I hate living in the mountains. For all you people who don't know, yes there are mountains in southern california, why anyone would choose to live in them i dont know...and my heaters broken.

2006-10-18 15:34:43 · 6 answers · asked by Anonymous in Weather

2006-10-18 15:34:28 · 7 answers · asked by jessiemlopez 1 in Mathematics

I need a function that lets me calculate the sum of all positive intergers less than or equal to N, when N is known of course. I know there is one, but I forgot what it was.

2006-10-18 15:32:49 · 4 answers · asked by trafficer21 4 in Mathematics

ok i'm sorry...i'm writing whats on my paper
(cos*+1/cos*-1)+(1-(1/cos*)/(1+(1/cos*)) equals (-2(cos*/sin*)^2)-2(1/sin*)^2.... i think is better written...i need it solved for...please and if anymore questions just write it down thanks

2006-10-18 15:32:11 · 3 answers · asked by sccstd2133 1 in Mathematics

2006-10-18 15:31:13 · 4 answers · asked by Aaron A 5 in Physics

2006-10-18 15:30:12 · 7 answers · asked by urjaed 1 in Weather

I know that it is the tuning effect of force and I know how to calculate it but I need more info. Any takers?

2006-10-18 15:30:07 · 1 answers · asked by Jamaican Dime 1 in Physics

what is the simplification of (AB + C'D + A'B + CD) ?

2006-10-18 15:28:54 · 3 answers · asked by procomp9 1 in Mathematics

I have a ques I just don't understand...anyone got any ideas?

Suppose you have a solution that might contain any or all of the following cations: Cu2+, Ag+, Ba2+, and Mn2+. Addition of HCl causes a precipitate to form. After the precipitate is filtered off, H2SO4 is added to the supernate and another precipitate forms. This precipitate is filtered off, and a solution of NaOH is added to the supernatant liquid until it is strongly alkaline. No precipitate is formed. Which ions are present in each of the precipitates? Which cations are not present in the original solution?

2006-10-18 15:28:46 · 2 answers · asked by Anonymous in Chemistry

I'm only familiar with the writings of Darwin from what was passed along to me in my biology textbooks in school and college. If you've read his works, or plan to read more of the collection, what do you think? Are they easy, difficult or even interesting reading? Are they better left to the biologists and serious biology students? What's your opinion? (
The link I read today from the BBC: http://news.bbc.co.uk/2/hi/science/nature/6064364.stm )

2006-10-18 15:28:29 · 5 answers · asked by Anonymous in Biology

I know it seems like a pointless question, and I guess I should first research how memory is actually stored... but I thought I would ask anyways.

2006-10-18 15:28:27 · 6 answers · asked by Amir 1 in Physics

2006-10-18 15:27:08 · 7 answers · asked by djbwlpt 1 in Medicine

If fire burns oxygen and paper as fuel, why does the oxygen even need to exist?
What makes oxygen "so important" that it can't be replaced with gasoline, paper, or any other alternative?

EX: If a match was lit in a very small room, the oxygen would quickly be used up. Adding gasoline vapors to the room to compensate for the lost oxygen would NOT keep the fire alive.
WHY!?!?!????

**Please don't give a stupid answer to this.... if you don't know, don't answer**

2006-10-18 15:23:50 · 6 answers · asked by duckyquack2007 3 in Chemistry

I'm doing a science project for school, but I can't find any info on how to do the topic i chose. Its supposed to be "Can people remember visuals or sounds better?". I need information that i could form a hypothesis with, the steps and everything but i cant find anything. Could someone please help me out? I have a deadline and if I don't complete it and turn it in, I fail science.

2006-10-18 15:23:38 · 3 answers · asked by Alan12425 1 in Other - Science

like you have to test something. like why does it do this or what cause this to happen and stuff. thank you!! :D

2006-10-18 15:18:12 · 5 answers · asked by dorkified at heart 1 in Other - Science

A) CaCO3
B) BaI2
C) AgCl
D) Hg2Cl2

Why?

2006-10-18 15:16:38 · 2 answers · asked by Erin C 1 in Chemistry

What is the conservation status of Western lowland Gorillas?

2006-10-18 15:15:54 · 4 answers · asked by Anonymous in Zoology

2006-10-18 15:13:29 · 4 answers · asked by Pickle 1 in Other - Science

2006-10-18 15:06:47 · 14 answers · asked by mary 1 in Mathematics

2006-10-18 15:02:32 · 4 answers · asked by Rainstar 1 in Biology