Science & Mathematics - 20 September 2007

2007-09-20 05:52:15 · 9 answers · asked by Michael n 2 in Physics

Don,t tell me they have a bottle of air each.

2007-09-20 05:51:11 · 16 answers · asked by cheeky chappie 3 in Astronomy & Space

You know how some pipes are made of copper well what makes copper good for making pipes?

2007-09-20 05:48:09 · 12 answers · asked by The Guru 2 in Engineering

2007-09-20 05:47:13 · 6 answers · asked by Anonymous in Medicine

I was on Prozac 80 mg. but it wasn't doing anything to help so my therapist changed me to 10 mg of Lexapro. I haven't have much luck with antidepression medications and I can't find on the web the one most prescribed for Agoraphobia. Please Help!
Thanks in advance!
Yvonne

2007-09-20 05:43:45 · 5 answers · asked by casper 3 in Medicine

not as in blood plasma, as in the fourth element, plasma.

thanks in advanced :)

2007-09-20 05:38:39 · 17 answers · asked by Anonymous in Chemistry

I am not sure how to do empitical formulas...
Here is an example: natural magnets (Iodestones) are found to consist of iron and oxygen. If a 5.678-gram sample contains 4.111 grams of iron, what is the empitical formula of this compound?

THe gemstone zircon is composed of zirconium, silicon, and oxygen. If a sample is found to have 49.8% zirconium, 15.3% silicon, and the reaminder oxygen, what is the empirical formula of zircon?

The narcotic drug morphine has the following percent composition: 71.50%carbon, 6.71% hydrogen, 4.91% nitrogen, and 16.82% oxygen. if the molar mass of the morphine is 285.4g/mol, what are the empirical formulas of morphine?

I have a lot more but just some hints on how to do this would be appreciated...

2007-09-20 05:34:51 · 4 answers · asked by Erika H 5 in Chemistry

i was in regular but got fregin transfered to honors and im not that smart in science and i really need help with these questions soooo if anyone knows the answers i would really appreciate it!!!!!!!!! thanks in advance!!!!!!!!!

A runner traveling with an initial velocity of 2.0 m/s accelerates at a constant rate of 1.9 m/s2 for a time of 3 seconds.

(a) What is his velocity at the end of this time?
m/s
(b) What distance does the runner cover during this process?
m



and


partscoretotalsubmissions1--10/42--10/4----2--A frightened cat, starting from rest, travels a distance of 4.90 m in 3.06 s, accelerating at a constant rate the entire time. What was her acceleration ?
Units?
m/s2
m
m2/s2
ms
m/s

and
A bus is accelerating at a rate of 0.340 m/s2. You are standing on the sidewalk as bus drives by. Exactly 3.31 s later it is travelling at 3.44 m/s. What was the velocity of the bus at the instant it passed you?
Units?
m
ms
m/s2
m/s
m2/s2
plz help!!

2007-09-20 05:33:28 · 3 answers · asked by Anonymous in Physics

I've recently started a course in radiography although my initial choice was to study nursing. However through mere chance i got onto radiography. I feel now that radiography is the right course to study as its very interesting. More interesting then nursing, although more difficult - but i still wonder if nursing is better.
I know i should decide what course is right for me personally but i just want to know other peoples opinions. If you had the choice what career from the two would you go for and why? which do you think has better future prospects?

2007-09-20 05:31:44 · 12 answers · asked by sabrina 3 in Biology

types of sugar are made from carbon, hydrogen and oxygen. how can sugar and even salt(NaCl) form from elements so that they can be consumed? can someone really eat carbon and oxygen?

2007-09-20 05:31:20 · 6 answers · asked by jj 1 in Chemistry

2007-09-20 05:27:46 · 6 answers · asked by abdi_11 1 in Zoology

2007-09-20 05:26:44 · 10 answers · asked by Anonymous in Mathematics

2007-09-20 05:24:30 · 3 answers · asked by miss_frd 1 in Chemistry

The gravitational acceleration at the surface of a planet is 25.5 m/s2. Find the acceleration at a height above the surface equal to half the planet's radius.

2007-09-20 05:21:50 · 3 answers · asked by wil 1 in Physics

2007-09-20 05:20:34 · 9 answers · asked by Terri L 2 in Biology

2007-09-20 05:19:04 · 19 answers · asked by alanhlsy 1 in Medicine

2007-09-20 05:17:15 · 4 answers · asked by Terri L 2 in Biology

2007-09-20 05:16:05 · 6 answers · asked by Terri L 2 in Biology

daylight and solar angle you would encounter.
encounter if you were to travel from the North Pole to
South Pole. (Be sure to use at least 5 or more different latitude locations on your travel
path.) Do the same for a day in the Southern Hemisphere winter.

2007-09-20 05:14:16 · 1 answers · asked by ccutestuff2001 2 in Weather

2007-09-20 05:08:56 · 9 answers · asked by Anonymous in Physics

A model rocket is launched straight upward
with an initial speed of 47.8 m/s. It acceler-
ates with a constant upward acceleration of
2.19 m/s2 until its engines stop at an altitude
of 180 m.
a) What is the maximum height reached by
the rocket? Answer in units of m.

b) When does the rocket reach maximum
height? Answer in units of s.

c) How long is the rocket in the air? Answer
in units of s.

2007-09-20 05:07:49 · 1 answers · asked by kimn 1 in Physics

2007-09-20 05:05:06 · 22 answers · asked by Anonymous in Mathematics

Please provide the answer with a neat diagram. This is to prepare for a examination. If you have the reference book please scan and give the answer.

2007-09-20 05:04:36 · 1 answers · asked by siva k 1 in Physics

2007-09-20 05:03:16 · 10 answers · asked by ? 7 in Weather

2007-09-20 05:02:43 · 3 answers · asked by Anonymous in Physics

2 questions ...

1. does sperm cells carry both xx or xy chromosomes or only x or y?

i think it is either x or y.

2. do each testicle(human) produce either x or y chromosome sperm or do they both produce both x and y?

cause then you could just get a vasectomy on one testical, or extract sperm from the testicle with the sex you want for artificial insemination and get the child sex you wish for.

thanks for responding

2007-09-20 04:58:00 · 4 answers · asked by bsmbahamas 1 in Biology

I have to write a formula for the following pattern:
1,5,12,22,35 etc.
(the difference between the numbers goes up by three.. eg. 5-1=4, 12-5=7, 22-12=10 etc.)
I can use as many variables as needed, and I have to find a formula that applies for any given whole number...

2007-09-20 04:56:59 · 2 answers · asked by Anonymous in Mathematics

For a Chemistry project. Where was Helium discovered?

2007-09-20 04:56:54 · 4 answers · asked by Anonymous in Chemistry

what are the equipment you use for a high voltage test, please list the steps taken during this operation

2007-09-20 04:52:12 · 4 answers · asked by kawuremi 1 in Engineering

log(base a) x + log(base a) x^2 + log(base a) x^3 + log(base a) x^4 = 5

2007-09-20 04:48:39 · 6 answers · asked by keshema2003 2 in Mathematics