Science & Mathematics - 19 December 2007

Hurricane Wilma set a record for the lowest air pressure ever measured in the Atlantic basin during a hurricane; 882 mb. How high would one have to ascend for the atmospheric pressure on a fair day to be 882 millibars?

2007-12-19 17:53:29 · 5 answers · asked by bishopsjewels 3 in Weather

solve the following differential equation

( x2 + 3xy + y2 )dx - x2dy = 0

2007-12-19 17:49:10 · 5 answers · asked by utt_sa 1 in Mathematics

This is basically the only thing holding me back in my math class. I just need a set of steps that I can apply to each problem or a simple explanation on what it means and how you do it. I think I remember it standing for First Inside Outside Last but that doesn't really help any.

Thanks!

2007-12-19 17:46:57 · 7 answers · asked by Mr.Steven 3 in Mathematics

(sec^2x-tanx)/1-cosx

in case anyone is confused, its secant squaredx - tangent x all over 1 - cosine x

i need to simplify using trig identities (pythagorean identies and basic stuff)

how do i do it, completely confused.

2007-12-19 17:39:50 · 2 answers · asked by goat_brother00 2 in Mathematics

w^2 -18-3w

2007-12-19 17:35:27 · 4 answers · asked by eric j 2 in Mathematics

2007-12-19 17:30:22 · 2 answers · asked by ~*~*SMOKEY*~*~ 1 in Mathematics

the equation of two sides of a triangle PQR are y-3x+6=0 and 3y-4y-2=0. D is the foot of the perpendicular from P to QR and the coordinates of D are (0, 4). find the equation of QR.

please explain .. thanx

2007-12-19 17:20:40 · 5 answers · asked by Anonymous in Mathematics

Also, is chlorine acidic or basic? What's the world's most powerful base?

2007-12-19 17:15:17 · 0 answers · asked by Anonymous in Chemistry

2007-12-19 17:14:53 · 3 answers · asked by ☆♥ C&ice♥☆ 2 in Mathematics

This applies for opening an envelope of the type where glue is preadded on typically both sides (so you wont need to lick them): When opening the envelope rather quickly in the dark, a blue light (like a tiny lightening) is emitted from glued surface. It only works if the envelope is opened fast. Can anyone explain this phenomena and what type of glue is used?

Regards Lucas Jensen

2007-12-19 17:02:49 · 6 answers · asked by Lucas 1 in Physics

50 points
1. what is a magnetic field?
2. what is an electromagnetic field?
3. what are magnets?
4. how have magnets changed over the years?
5. what environment makes magnets work best?

2007-12-19 17:02:40 · 2 answers · asked by pailar2003 2 in Other - Science

2007-12-19 16:59:45 · 2 answers · asked by Nick 2 in Astronomy & Space

2007-12-19 16:59:24 · 2 answers · asked by rose 1 in Mathematics

I'm so confused! is it Pe^rt or is it
A=P(1+r/n)^nt (A=?, P=principle, r=rate, n=?, t=time)

help me i have an algebra final tomorrow!

in Per^rt
P= principle
e=e
r=rate
t=time

2007-12-19 16:55:01 · 3 answers · asked by Anonymous in Mathematics

As Bill Clinton tried to say, oral sex is not sexual relations.
Trying to say only penetration intercourse is.

What I want to know is do you agree with him?

Or do the following actions constitute sexual relationships: those involving the use of mouths, fingers, toys, other body parts etc. and activity where the gentialia are involved and climax occurs.

Basically, is it sex if you don't have vaginal penetration.

Help to settle our debate over sementics and word meanings in reality and practice.

But don't be stupid.
Keep your answers focused on the main question &
not in the gutter. Don't focus on the sex or rauchy.

Thanks in advance for being cool with this question.

2007-12-19 16:52:27 · 3 answers · asked by Anonymous in Other - Science

2007-12-19 16:51:50 · 4 answers · asked by bbyboy16 1 in Chemistry

2007-12-19 16:49:28 · 6 answers · asked by jvarias1 2 in Zoology

2007-12-19 16:47:41 · 15 answers · asked by lili p 2 in Other - Alternative

I am really into astronomy but i always wondered how they get the pictures they have. Some are infered and are horrible pixilated pictures that are just dull then they have some blurry pictures of stuff in our solar system. Then they have amazing pictures that are just crazy! Like star clusters, nubulas, galaxies.... but then we d
on't have very many images of pluto...

-How do they get pictures of galaxies and thousands of stars?
-Why can't they get a great picture of neptune or pluto if they can of galaxies?
-Are most pictures just digitaly made
-Are they pieced together?

Please write somewhere in your answer if you have any prior knowlege about astronomy or are educated in it. I don't mind input i just don't want to be told something thats completely off and an un-educated guess

2007-12-19 16:39:12 · 9 answers · asked by Master shake 3 in Astronomy & Space

I don't think they are but my friend says they kill you

whos right me or my friend ??

2007-12-19 16:37:24 · 3 answers · asked by bugz_ink@sbcglobal.net 2 in Zoology

I think it was DNA. Was there anything MORE important than DNA discovered in the past 50 years?

2007-12-19 16:35:31 · 14 answers · asked by Deenie 6 in Other - Alternative

A block of mass M1 slides along a frictionless tabletop at a speed of v0 toward a second block of mass M2. A coil spring with spring constant k is attached to the second block in such a way that it will be compressed when struck by the moving block. What is the maximum compression of the spring?

This is the drawing given with the problem:
http://img43.imagevenue.com/img.php?image=28138_mass_spring_drawing_122_1014lo.jpg

Thanks in advance,
-tauntingpillow

2007-12-19 16:24:14 · 3 answers · asked by tauntingpillow 1 in Physics

Could a pinhole microwave camera be made? I'm talking about a camera to see the wavelengths used by cell phone. If I remember right, they're a maximum of a few inches in size. Is there an easy way to focus microwaves like a camera focuses visible light, or would it have to work like a pinhole camera? Would mirrors work, like a reflective telescope? How much "brighter" is a cell phone than background microwave radiation on the earth?

2007-12-19 16:22:57 · 6 answers · asked by Anonymous in Physics

i am a high school sophomore and i am starting to think about college and my future career. I would love to work in a hospital ER, but i have one question. i am confused about Emergency Medicine...some sites list it as a major and others dont. I basically want to be an ER physician, so what would i have to major in in college and what courses would i have to take?
*i don't want to specialize in anything, i want to work in the ER for all of my medicinal career*

2007-12-19 16:21:48 · 4 answers · asked by Anonymous in Medicine

If I did 100 situps in 148 seconds approximently how many seconds does it take for me to do 1 situp? Explain to me how you got your answer please! Also how many seconds does it take for me to do 1 situp if I did 100 situps in 163 seconds.
Explain how you got your answer!
Thanks!

2007-12-19 16:18:33 · 11 answers · asked by Anonymous in Mathematics

2007-12-19 16:18:09 · 9 answers · asked by diehard 1 in Astronomy & Space

A cannon at rest with a mass of 1.2 x 10^3 kg fires a 53kg person out of it (horizontally) at a velocity of 67 m/s. What is the recoil velocity of the cannon?

2007-12-19 16:16:08 · 6 answers · asked by Kayla B 1 in Physics

2007-12-19 16:15:21 · 10 answers · asked by Science Lover 1 in Parapsychology

they say ice age but i thought its gettin hotter?

so in the future will be hella hot or cold as ice

2007-12-19 16:10:45 · 4 answers · asked by GSUP 2 in Earth Sciences & Geology

what will be the lengthof DNA double helix in X chromosome in human

2007-12-19 16:07:49 · 2 answers · asked by Anonymous in Medicine