Science & Mathematics - 3 September 2007

introduction to physical science- scientific inquiry

2007-09-03 09:49:50 · 2 answers · asked by gomarissa 2 in Physics

please list resource. Thanks!

2007-09-03 09:49:30 · 2 answers · asked by jamet002 2 in Chemistry

2007-09-03 09:49:04 · 2 answers · asked by Anonymous in Mathematics

2007-09-03 09:48:23 · 3 answers · asked by Anonymous in Mathematics

Find the domain and range for each function
a.) y=Sqr (x-4)

b.) y=Sqr (x^2-4)

c.) y=Sqr (4-x^2)

determine the points of intersect:

y=cos(x) and y=sin (x) in the first quadran

2007-09-03 09:46:45 · 2 answers · asked by jehu22293 2 in Mathematics

So, AP Chem. is hell.

Let's say you had to draw 2-methyl-3-octene

where would you place the "H" and the "="

gah, I wish I can draw on here.

I already have the following::

H-C-C-C-C-C-C-C-C-H

where would you place the methyl, equal sign, and the other hydrogen bonds?

2007-09-03 09:41:09 · 2 answers · asked by Anonymous in Chemistry

For instance, I'm trying to figure out the acute angle between the surfaces:
x(y^2)z = 3x + z^2 and 3x^2 - y^2 + 2z = 1 at the point (1,-2,1).

Any help would be appreciated. Thanks! :)

2007-09-03 09:39:06 · 1 answers · asked by frostwizrd 2 in Mathematics

1. Jules Verne in 1865 proposed sending men to the Moon by firing a space capsule from a 220-m-long cannon with final speed of 10.97 km/s. What would be the unrealistically large acceleration experience by the space traverlers during the launch.( A human can stand an acceleration of 15g for a short time.)
2. An aircraft has a lift-off speed of 120 km/h. What minimum constant acceleration does this require if the aircraft is to be airborn after a takeoff run of 240m.
3. A train is traveling down a track at 20m/s when the engineer applies the brakes, resulting in an acceleration of -1.0m/s squared as long as the train is in motion. How far does the train move during a 40s interval starting at the instant the brakes were applied?
4. A mailbag is released from a helicopter that is descending steadily at 1.5m/s. After 2.00s, (a) what is the speed of mailbag (b) how fart is it below the helicopter (c) what would be the answers to A and B if the helicopter was going up at speed of 1.5m/s

2007-09-03 09:36:43 · 1 answers · asked by RickySingh2006 2 in Physics

A Star is formed when gases our pulled together by gravity. As the gases get more and more condensed they start to heat up. Gravity is still during this process continually making it more and more dense, thus the mass of gas becomes hotter and hotter until it finally gets hot enough to produce nuclear fusion. At this point the nuclear fusion helps counteract the natural force of gravity by burning up it's helium that is produced by the process, thus causing the star to shine and also and more importantly pushing against the force of gravity not letting it further condense it any smaller. If not for the stars nuclear fusion and it burning up it's helium in the battle against gravity it would collapse and gravity would win. In which case once it uses up all it's helium, gravity will win taking it to the next phase of it's life.

My question is this, if gravity is a universal law affecting all mass the same, then why aren't planets..........ran out of characters one sec

2007-09-03 09:35:22 · 13 answers · asked by Anonymous in Astronomy & Space

Let x_n be a sequence of real numbers such that lim (x_n - x_(n-1)) = k. Show that lim (x_n)/n = k.

If lim (x_n)/n = k, then is it true that lim (x_n - x_(n-1)) = k?

Thank you for any help

2007-09-03 09:34:22 · 2 answers · asked by Tania 1 in Mathematics

(1). y=(tan^-1)(sqrt(5x^2-1))

dy/dx=??

(2). f(x)=8xarcsin(x)
f '(x)=????

2007-09-03 09:31:19 · 3 answers · asked by Anonymous in Mathematics

Thanks for answering

2007-09-03 09:30:01 · 3 answers · asked by edbiology 1 in Mathematics

what does fluorine look like in...
its pure form and its natural form?

what is pure form and natural form anyway?

2007-09-03 09:29:23 · 7 answers · asked by Anonymous in Chemistry

Okay, so the variables totally threw me off, can someone guide me through this step by step?

2007-09-03 09:27:36 · 8 answers · asked by Answwr 2 in Mathematics

2007-09-03 09:26:28 · 8 answers · asked by greekgirl95@sbcglobal.net 1 in Biology

Mate of me was trying to convince me that black holes in space fart and produce matter elsewhere in the Universe or the Multiverse and that is how the Big bang happened. If this is true I was wondering how it equates to the string theorists current idea that the Big Bang was created by the collision of two 11th dimensional membranes.

2007-09-03 09:26:17 · 21 answers · asked by Anonymous in Astronomy & Space

its this pyramind that helps you solve problems like this it goes something like this:
1
11
121
.....

that is all i know i need to know whole pyramind up to the 12th row please help me

2007-09-03 09:25:22 · 4 answers · asked by kris 2 in Mathematics

2007-09-03 09:24:26 · 3 answers · asked by Anonymous in Physics

its for my science class

2007-09-03 09:23:04 · 11 answers · asked by Anonymous in Chemistry

2007-09-03 09:20:48 · 5 answers · asked by awesome 2 in Mathematics

(2 x 10^4)times(2 x 10^-6)

(4 x 10^2)/(2 x 10^-3)

(6 x 10^12)+(5 x 10^11)

(4 x 10^15)-(2 x 10^13)

can you please show your work

2007-09-03 09:20:40 · 2 answers · asked by stat 2 in Mathematics

I saw these pics in the net where there was a golden scorpion in it! Is there some thing like that?

2007-09-03 09:19:52 · 3 answers · asked by Anonymous in Zoology

A baseball is seen to pass upward by a window 29 m above the street with a vertical speed of 8 m/s. The ball was thrown from the street.

(a) What was its initial speed?...m/s
(b) What altitude does it reach?....m
(c) How long after it was thrown did it pass the window?....s
(d) After how many more seconds does it reach the street again? ....s

please also explain to me how to do it, i would really appreaciate it ..Thanks :)

2007-09-03 09:18:35 · 2 answers · asked by Nikita 1 in Physics

2007-09-03 09:17:59 · 3 answers · asked by jacksjarofdirt 1 in Chemistry

ok i wanna get this straight, people are saying that all red, blue, black, yellow diamonds are lab created and that they arent really natural

so does that mean that all people that have fancy colored diamonds means there fake?

so do they really add color in diamonds to make more money because they are fancy colored? or is this just a myth

2007-09-03 09:16:44 · 3 answers · asked by bunni 1 in Earth Sciences & Geology

I know the answer, but it's the steps that's been confusing me and I don't even know if my answer is right. When I do problems like these I usually come up with one line, skipping all the steps. Can someone guide me through this step by step?

2007-09-03 09:15:32 · 4 answers · asked by Answwr 2 in Mathematics

Sounds kinda stupid, I know. But whenever I watch documentaries about the universe, astrophysics, etc., I feel emotionally moved in a way that I can only compare to a religious experience. I mean, when one just TRIES to contemplate the vastness of the universe and our relatively infinitismal place in it, I am awed.
I don't mean to be condescending, but it makes me feel kinda sorry for the religiously devout whose perception of reality is, I would respectfully submit, terribly limited.

2007-09-03 09:15:24 · 7 answers · asked by Anonymous in Astronomy & Space

Hello~
For my AP chemistry class, we did a lab practical where we used KH2PO4 and K2HPO4. That question that I need answered is, "why are these compounds labeled monobasic and dibasic"?
Is it simply because of the amount of hydrogen atoms in its moelcules? So would the KH2PO4 would be the dibasic while the K2HPO4 would be the monobasic? Is that all I need to say to completely answer the question?
Thank you very much in advance!

2007-09-03 09:14:45 · 2 answers · asked by she*wished 2 in Chemistry

2007-09-03 09:14:12 · 1 answers · asked by Anonymous in Chemistry

Let alpha: A->B and omega: B->C be functions s.t. (omega)(alpha) is onto. Prove that omega is onto.

2007-09-03 09:12:08 · 1 answers · asked by mandy 1 in Mathematics