Science & Mathematics - 26 October 2007

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A vector v has initial point P1 and P2. Write v in terms of ai + bj:?

P1 = (-5, 1); P2 = (6, 3)

2007-10-26 07:35:14 · 3 answers · asked by Hamid K 1 in Mathematics

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Given the function g(x)=3x-3 with a domain of {x/-2< or equal to x < or equal to 4}find the range?

2007-10-26 07:33:42 · 2 answers · asked by yanksrule4691 1 in Mathematics

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Proportional decrease?

"How It's Made" (Science channel) was showing thick cotton yarn being thinned down for weaving. "Depending on its purpose, this stage 3 yarn is 3½ to 16 times thinner than stage 2 yarn."

What does it mean to make something 16 times thinner? 16 times what?

2007-10-26 07:31:38 · 4 answers · asked by DWRead 7 in Mathematics

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whats a bumble bee??

2007-10-26 07:31:29 · 4 answers · asked by ? 2 in Zoology

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Which of the following molecules would be expected to have the lowest boiling point?

1) CH4
2) C12H26
3) C16H34
4) C2H6
5) C8H18

2007-10-26 07:30:35 · 8 answers · asked by cloud851 5 in Chemistry

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Complete the identity:?

sinq/cosq + cosq/sinq

2007-10-26 07:29:47 · 3 answers · asked by Hamid K 1 in Mathematics

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Use L'Hopital's Rule to evaluate the limit of F(x) as x approaches 0: F(x) = (e2x - 1) / x?

2007-10-26 07:27:12 · 2 answers · asked by Shawna 1 in Mathematics

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Are these numbers rational, irrational, real or complex?

1. (4)1/2 + 2

2. 30007.413

3. 1

Please help me and tell me why these numbers are rational, irrational, real or complex? Thanks so much!!

2007-10-26 07:26:55 · 7 answers · asked by Hope C 1 in Mathematics

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Solve the triangle. Round lengths to the nearest tenth and angle measures to the nearest degree.?

B = 29°
C = 112°
b = 35

2007-10-26 07:26:20 · 2 answers · asked by Hamid K 1 in Mathematics

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Order Of Operations...?

where can I find an online calculator for this ****....

2007-10-26 07:24:17 · 3 answers · asked by Anonymous in Mathematics

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Why do thunderstorms (lightning) produce or generates such a loud noise when strucked?

2007-10-26 07:21:59 · 7 answers · asked by Morne 1 in Weather

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heat evoleved in kJ from 5 g of Al and 25 g of Fe2O3?

How much heat in kJ is evoleved when 5.00 grams of Aluminum reacts with 25.0 grams of Iron (III) Orxide?

Al (s) + Fe2O3 (s) --> Fe (s) + Al2O3 (s) +851.5 kJ

2007-10-26 07:20:45 · 2 answers · asked by kay 2 in Chemistry

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origin of Potomac river?

2007-10-26 07:19:39 · 2 answers · asked by Josephine L 1 in Geography

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Physics problem???? I have two problems that I cannot get. Please Help?

1. A 0.50 kg block, starting at rest, slides down a 30.0° incline with kinetic friction coefficient 0.24 (the figure below). After sliding 82 cm down the incline, it slides across a frictionless horizontal surface and encounters a spring (k = 38 N/m). What is the maximum compression of the spring? and After the compression of part (a), the spring rebounds and shoots the block back up the incline. How far along the incline does the block travel before coming to rest?

2.A crate of mass m1 on a frictionless inclined plane is attached to another crate of mass m2 by a massless rope. The rope passes over an ideal pulley so the mass m2 is suspended in air. The plane is inclined at an angle = 36.9°. Use conservation of energy to find how fast crate m2 is moving after m1 has traveled a distance of 1.4 m along the incline, starting from rest. The mass of m1 is 13.4 kg and the mass of m2 is 18.8 kg.

Any kind of help would be really really appreciated. Thanks

2007-10-26 07:18:37 · 1 answers · asked by Amanda P 1 in Physics

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What part of an enzyme carries out a chemical reaction?

I need help on this its for chem!!!

2007-10-26 07:16:14 · 3 answers · asked by Gio R 1 in Chemistry

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Change the order of integration?

Here is the equation..sorry i couldn't find a way to paste it
http://img3.freeimagehosting.net/image.php?63beb02fc0.jpg

change the order of integration from dydx to dxdy

Thanks!

2007-10-26 07:14:28 · 4 answers · asked by dkmu 1 in Mathematics

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wats (radical-2) in a+bi form?

2007-10-26 07:13:58 · 3 answers · asked by Anonymous in Mathematics

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do you agree that the theory of darvinian evolution is true?

i do not believe it but give me some more idea.

2007-10-26 07:11:40 · 8 answers · asked by Anonymous in Biology

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if the tempature today is 0 degrees. and the tempature for tomorrow is going to be twice as cold. what is it?

2007-10-26 07:10:13 · 12 answers · asked by jude m 1 in Weather

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Graph the line and label the x- and y- intercepts?

Graph the line and label the x- and y- intercepts.

-3x/4 + y/2 = 0

2007-10-26 07:07:50 · 5 answers · asked by Anonymous in Mathematics

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please help! dividing decimals!?

divide and round the quotient to the nearest hundreth:

1. 3.1 divided by 9

2. 6.1 divided by 6

3. 0.11 divided by 0.7

4. 0.97 divided by 0.7

2007-10-26 07:06:44 · 10 answers · asked by kristine z 2 in Mathematics

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My deceased Uncle's watch....?

He left behind a Bulova, not sure of it's age... (<30) My 8-yr daughter would like to wear it. Having gone to WalMart, and then a few places in the mall, none of which would touch the thing (battery-wise). Ended up at a local jeweler's repair shop to tell me that the watch needed a mercury battery that was out dated (out lawed) some time ago. Isn't there some cell that satisfies the watch's requirements? Somebody tell me the technicality of this. Does it have to do with voltage or polarity?

2007-10-26 07:05:27 · 2 answers · asked by Christopher D 2 in Physics

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IF everyone on the planet walked in the same direction...?

...either gainst or with the rotation of the planet could we slow down/speed it the planets rotation? we disscussed this in physics A-level some years back it was fairly interesting so I just wanted to see what you guys thought even though I do know the answer

2007-10-26 07:01:46 · 10 answers · asked by vorash 3 in Physics

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