Science & Mathematics - 22 October 2007

In a lab experiment, we ran up stairs and figured out our power by calculating work done divided by the time it took. Work=gravitational potential energy. The question is...is this a true measure of your body power?

2007-10-22 17:09:01 · 6 answers · asked by Anonymous in Physics

derivative:

f(x)=7x^6 - 8/x^3 + 3(sq root of x)


antiderivative:

x^7 + 4/x^2 + 3/2x + C

2007-10-22 17:07:32 · 3 answers · asked by Anonymous in Mathematics

2007-10-22 17:04:25 · 11 answers · asked by gandhi 2 in Astronomy & Space

2007-10-22 17:03:26 · 1 answers · asked by Alexandria C 1 in Mathematics

Q1: Secretory proteins are:
A) Incorporated into the mitochondrial membrane
B) Produced by the cell for internal use
C) Chemically modified in the nucleus
D) Released from the cell through the plasma membrane
E) Produced by the ribosomes on the smooth endoplasmic reticulum.

Q2: Light microscopes:
A) work by reflecting electrons off the surface of an object being studied.
B) Typically provide more resolution than an electron microscope
C) can generally magnify objects about 10,000 times without blurring.
D) use light and glass lenses to magnify an image.
E) all of the choices are correct.

2007-10-22 17:02:46 · 6 answers · asked by Anonymous in Biology

2007-10-22 16:59:53 · 8 answers · asked by Anonymous in Astronomy & Space

I recently bought this car from a private seller and it did not come with a manual. The radio requires a 4 digit code using the numbers 1-6. Is there anything I could do besides going to the manufacturer of the radio.

2007-10-22 16:58:29 · 4 answers · asked by Jessica 2 in Mathematics

2007-10-22 16:56:58 · 13 answers · asked by Mercury 2010 7 in Astronomy & Space

Can someone please help me with these?
(Nuclear equations)
1)Alpha decay of polonium-210 (210-top left && 84-bottom left --Po)
2)Beta decay tritium (3-top left && 1-bottom left -- H)
3)Alpha decay of thorium-230 (230-top left && 90-bottom left -- Th)

Any help will be greatly appreciated, thank you!! (:

2007-10-22 16:54:43 · 1 answers · asked by Ami 2 in Chemistry

2007-10-22 16:54:35 · 6 answers · asked by sarahx3l 1 in Biology

2007-10-22 16:50:44 · 1 answers · asked by Anonymous in Chemistry

2007-10-22 16:49:47 · 16 answers · asked by Anonymous in Mathematics

2007-10-22 16:48:50 · 7 answers · asked by sebastian n 3 in Astronomy & Space

This is a question on my math packet, and my brain is fried right now. I just can't seem to figure it out.

Details are appreciated immensely, and are clear explanations.

Side length--s--is 1, and I need the area for iterations 0 through 6 with the recursive formula and the explicit formula, as well as the finite area of the curve.

From Googling, I found the final area asfter an infinite amount of iterations to be either 8x/5 or (2 * sq. root 3)/5 *s^2.

I don't understand the discrepancy.

Thank you in advance.

2007-10-22 16:46:39 · 2 answers · asked by Anonymous in Mathematics

2007-10-22 16:46:27 · 2 answers · asked by royce 1 in Chemistry

2007-10-22 16:46:13 · 3 answers · asked by Anonymous in Biology

(2x-y)(x^2+2xy-y^2)

2007-10-22 16:45:56 · 2 answers · asked by Anonymous in Mathematics

just finished watching a segment on the O'Reilly Factor (don't hold it against me) with Bill and Ben Stein (yes, that Ben Stein) discussing Stein's new movie about how intelligent design proponents are being persecuted. Bill kept asking the completely ignorant questions (Why isn't it okay to just mention intelligent design in Kansas biology classrooms, for just one example), and Stein kept spouting about how evolution was a wonderful theory for the mid-1800's and how brilliant of a guy Darwin was but his theory is filled with holes. 2 questions: 1) Is there any research being done to support ID, or predictive power of the "theory", or any scientific basis for it (I'm pretty sure I know the answer to this)? and 2) Is this movie on anyone's "must see" list (the movie is called "Expelled: No Intelligence Allowed")?

2007-10-22 16:43:48 · 6 answers · asked by the_way_of_the_turtle 6 in Biology

I used to be a "Doubting Thomas" too when it came to ghosts and such, but recently.....

http://answers.yahoo.com/question/index;_ylt=ApUrcF6LqhrKOD9a40FsD3nsy6IX;_ylv=3?qid=20071022201434AAul3Kg

2007-10-22 16:43:29 · 19 answers · asked by Anonymous in Paranormal Phenomena

*Detailed explanation please?

2007-10-22 16:41:33 · 3 answers · asked by Aya S 1 in Medicine

I know that fresh pineapple prohibits gelatin protein from cross-linking to form the semi-solid gel as the temperature cools. can anyone explain this to me?

2007-10-22 16:39:53 · 3 answers · asked by Anonymous in Biology

cell
organ system
organism
tissue
organ

2007-10-22 16:39:36 · 2 answers · asked by Anonymous in Biology

2007-10-22 16:38:56 · 11 answers · asked by Anonymous in Mathematics

2007-10-22 16:36:36 · 2 answers · asked by Memo 3 in Physics

Cell respiration is a biochemical pathway performed in eukaryotic cells, where 1 and 2 are used as reactants. The products at the end of cell respiration are 3 , 4 , and 5.

2007-10-22 16:36:26 · 2 answers · asked by shawna 2 in Biology

My friend is over in San Diego with all the fires.
She lives in Chula Vista, the west side of it, and I heard the east side of Chula Vista is being evacuated or something because of the fires nearby.
Should she start to prepare?! Should she evacuate soon?! Will the fire reach her, if so, what is the estimated time?Please update me on details!

2007-10-22 16:34:04 · 5 answers · asked by Anonymous in Geography

What is misleading about the following statement? "Plants peform photosynthesis, and animals perform cellular respiration."

2007-10-22 16:33:13 · 4 answers · asked by shawna 2 in Biology

i) f(x)=x^2sin(1/x)

ii) f(x)=xe^1/x

iii) f(x)=x/sin(x^2)

2007-10-22 16:29:24 · 2 answers · asked by Jen T 1 in Mathematics

which of these hydrates ( CuSO4, CdCl2, CaCl2) will have a vapor pressure of water:

A) Greater than the partial vapor pressure of water in the atmosphere at room temperature? Explain.

B) Less than the partial vapor pressure of water in the atmosphere at room temperature? Explain.

2007-10-22 16:28:47 · 1 answers · asked by NEEDs MATH HELP!! 1 in Chemistry

10 points to the first person to get it right.

2007-10-22 16:25:37 · 6 answers · asked by Purple 1 in Biology