Science & Mathematics - 19 October 2007

Also what is the square root of i and the square root of -i.

2007-10-19 09:38:24 · 13 answers · asked by Anonymous in Mathematics

You are given a vector in the xy plane that has a magnitude of 80.0 units and a y component of -45.0 units.
(a) What are the two possibilities for its x component?
(b) Assuming the x component is known to be positive, specify the vector which, if you add it to the original one would give a resultant vector that is 80.0 units long and points entirely in the -x direction. What is magnitude and what is direction?

2007-10-19 09:38:15 · 1 answers · asked by hahahahahaha 1 in Physics

2007-10-19 09:36:25 · 2 answers · asked by lisa 2 in Botany

Does anyone know how can I synthesis cyclopentane from molecules that doesn't have more than two carbon atoms?
Thanx for your help!

2007-10-19 09:35:49 · 2 answers · asked by Andreja K 3 in Chemistry

in a well defined beam? What kind will spread evenly throughout the room? Roughly what frequency marks the boundary between the two cases?

2007-10-19 09:35:17 · 1 answers · asked by kntagler 1 in Physics

ok the pressure on my eye is 27mmHg and i take alot of medicines to control it
ok but the thing is that my eye is totally atypical as my doctor says the normal thickness of the cornea is 520mm while mine is 726mm so my eye can support higher pressure because of that and that the 27mmHg may mean 22 or lower
do you know anythign about it? can you say what would be a normal pressure to an eye in my condiction? also do you know anythin g i can do besides medicine and surgery to low the pressure? anything i can eat , drink ..
i also would like to know if stress make it higher

thanks very much

2007-10-19 09:33:24 · 3 answers · asked by Anonymous in Medicine

2007-10-19 09:32:40 · 7 answers · asked by Anonymous in Astronomy & Space

any allignment going to happen or predicted to happen and what is new that wed be alligning with?

2007-10-19 09:32:21 · 6 answers · asked by Anonymous in Astronomy & Space

What does this symbol mean in math ^ on the computer?

I need help in solving these problems as follows:

Reduce answers to lowest terms

1.) 2 11/12 - 1 13/18



2.) 3/8 x 2/3 divided by 4



3.) 3/2 x 1/3 x 4/5



4.) 3/2 x 1/3 divided by 4/5



5.) 3/2 divided by 1/3 + 4/5



6.) (3/2 +1/3) x 4/5

2007-10-19 09:27:27 · 9 answers · asked by ione_thestar1 4 in Mathematics

i DO believe time travel is possible an maybe im gonna take bajak time travel circuit to make it perfect and make it work
everything is possible.
here is the link:
http://paranormal.about.com/gi/dynamic/offsite.htm?zi=1/XJ/Ya&sdn=paranormal&cdn=newsissues&tm=10&f=20&su=p284.8.150.ip_&tt=14&bt=1&bts=1&zu=http%3A//www.keelynet.com/time/bajak1.htm
what is your opinion about his findings other than hes crazy?

2007-10-19 09:24:58 · 10 answers · asked by Anonymous in Paranormal Phenomena

2007-10-19 09:19:46 · 2 answers · asked by Cligztraizt 1 in Engineering

How do you make fog come out like over liquid like this,
http://www.handbook.unsw.edu.au/images/userimages/SCI/ChemistryI.jpg
without all the funky chemicals?

2007-10-19 09:19:14 · 4 answers · asked by Mr.AwEsOmE555 1 in Chemistry

2007-10-19 09:17:59 · 5 answers · asked by thx0x472 1 in Biology

2007-10-19 09:16:48 · 8 answers · asked by Anonymous in Engineering

2007-10-19 09:16:29 · 6 answers · asked by klunk 3 in Astronomy & Space

is there anti gravity source on earth if there is where is it

2007-10-19 09:16:23 · 5 answers · asked by om 1 in Astronomy & Space

motor 24 volts dc 2.42 amps

2007-10-19 09:13:42 · 1 answers · asked by Edward A 1 in Engineering

Diamagnetic is defined as atoms or ions in which all the electrons are paired in filled shells so their magnetic fields effectively cancel each other. Now, I know N2 is diamagnetic because it was the answer to a question on a practice test that I took but O2 was also a choice and it seems to me that there are no unpaired electrons when oxygen is bonded to itself through a double bond. Am I wrong about this? Why is oxygen not diamagnetic?

2007-10-19 09:13:20 · 1 answers · asked by Anonymous in Chemistry

i work on the humanoid robot & blance of a human if some body can help us in this project pls help me & guide me to the right way

2007-10-19 09:12:01 · 2 answers · asked by /\/\0sht^gh 1 in Engineering

what is s s - 4 over 7 = negative 2 over 3.

what is m negative 7 over 8 + m = negative 2 over 5

what is f 5 over 12 + f = negative 2

these dont make any sense but if you can answer them then do it please

x / a = b and ax= b

2007-10-19 09:11:21 · 3 answers · asked by bobthebuilder 1 in Mathematics

What is the smallest prime number? Is it 1 or 2?

2007-10-19 09:10:22 · 18 answers · asked by Anonymous in Mathematics

I have a test on Monday on this stuff and these were the questions on last years exam. Can someone help me with these please?! Thanks!

1.) A circle C has center at the origin and radius 7. Another circle K has a diameter with one end at the origin and the other end at the point (0,19). The circles C and K intersect in two points. Let P be the point of intersection of C and K which lies in the first quadrant. Let (r, theta ) be the polar coordinates of P, chosen so that r is positive and 0 is less than or eq to theta whis is less than or eq to 2. Find r and theta.

2.) A curve in polar coordinates is given by: r = 12 + 3 cos theta.
Point P is at theta = (27pi/24)
a.) Find polar coordinate r for P, with r > 0, pi < theta < (3pi/2)
b.) Find cartesian coordinates for point P.
c.) How may times does the curve pass through the origin when 0< theta , 2pi ?

2007-10-19 09:06:53 · 3 answers · asked by Anonymous in Mathematics

The Nobel Prize is a very prestigious award given for outstanding work or science. Imagine that you are receiving a Nobel Prize for science. What have you done to deserve that honor?
Please be very specific and detailed in your writing.

2007-10-19 09:05:34 · 3 answers · asked by Right here Right now 1 in Other - Science

How did the geography affect this cities purpose? (For example, how did the locoal geography benefit this city?)

Who lived in the city? What does this tell you about the city?

Please, I really need help! So if you know anything about these questions, please let me know. Thankyou!

2007-10-19 09:04:03 · 4 answers · asked by The BecaNATOR 5 in Geography

how to factor this?

-x^2 + 3x -2

2007-10-19 09:01:46 · 9 answers · asked by tmlfan 4 in Mathematics

when computers are developing only in recently and are expecting much more growth for the next 30 to 50 years. So even now the scientists are not satisfied with the speed of development even when normal people feel we are developing. So how can the US people such a long back visited moon without any fault. Our Sunita Williams and Kalpana Chawla at this present world just went to space station and returning back to earth safely is not guaranteed till they land on earth safely. How the Neal Armstrongs group landed on moon without any error such a long back.

2007-10-19 08:58:28 · 29 answers · asked by Sooraj Kumar 2 in Astronomy & Space

g(x)=x^2-2x-15

2007-10-19 08:57:01 · 2 answers · asked by Anonymous in Mathematics

If you believe or no explain

2007-10-19 08:55:00 · 9 answers · asked by Anonymous in Astronomy & Space

2007-10-19 08:50:47 · 11 answers · asked by Anonymous in Astronomy & Space

2007-10-19 08:49:35 · 4 answers · asked by curioussss 1 in Mathematics