Science & Mathematics - 29 August 2007

2007-08-29 14:46:45 · 12 answers · asked by Anonymous in Zoology

This is driving me nuts. Any math wizz answer this for me please:

Why am I getting different deviation values when I work it out on paper than when I use excel. Heres the problem:

Average: 50.08
5 tests: 50.11, 50.08, 50.10, 50.07, 50.05

By hand I get: .0239791576
With excel I get .023874673

Am I working this out right? What did you get when you did both? Thanks in advance.

2007-08-29 14:45:08 · 2 answers · asked by Anonymous in Mathematics

2007-08-29 14:44:19 · 3 answers · asked by jaguarz 1 in Biology

This is a math problem ; and I need to make an equation using 6 9's [six 9's] with any operations or parantheses/brackets you want?
Thanks!

2007-08-29 14:42:35 · 5 answers · asked by jgbaek 4 in Mathematics

2007-08-29 14:42:03 · 3 answers · asked by teck kim 2 in Biology

2007-08-29 14:39:24 · 2 answers · asked by teck kim 2 in Biology

How many times is the moon full each month? Does it vary? Also, does anyone know a good site where I can see what dates the moon was full a few years ago?

2007-08-29 14:39:00 · 5 answers · asked by gecko 2 in Astronomy & Space

I dont know what it is. It's in my heart (or my left chest if you will) and my shoulder, and I cant sleep because it hurts so much. The pain is connected. I feel it when I breath and move my left shoulder or chest. It didnt start until after swimteam practice today and Im a little scared because I have no idea what it is. Both my parents are unavailable at the moment, and its too late at night to call someone. I cant sleep it hurts so much, I dont know what to do. Advice?

2007-08-29 14:38:56 · 8 answers · asked by Anonymous in Medicine

Solve this?!?

2007-08-29 14:33:58 · 8 answers · asked by shellyeph 1 in Mathematics

Thank you!

2007-08-29 14:31:58 · 3 answers · asked by Anonymous in Other - Science

Why would homeowners prefer a “southern exposure” (i.e. large windows
on the south side of the house) in the U.S. but a “northern exposure” in Australia?

2007-08-29 14:26:51 · 4 answers · asked by ChEMIsTrY ChICkiE 1 in Astronomy & Space

2007-08-29 14:26:36 · 9 answers · asked by Tameeka 1 in Biology

i just know you should pour the acid into wateer.. but why?

2007-08-29 14:23:16 · 3 answers · asked by Anonymous in Chemistry

The area of the paper on a roll commonly used to print newspapers is 100 * 10^4 yd^2. Express the area in square meters, square centimeters, and square miles....

2007-08-29 14:22:34 · 1 answers · asked by Anonymous in Mathematics

Do you think it's possible that after about, say, a few million more years of evolution a brain could develop telekinetic ability? Are there any legitimate scientific reasons to believe this could happen?

I'm asking because I'm trying to write a science fiction story. But I don't want my story to be completely absurd. I want it to be at least somewhat plausible.

2007-08-29 14:22:27 · 4 answers · asked by Anonymous in Biology

2007-08-29 14:18:21 · 4 answers · asked by ElDarado05 2 in Mathematics

tan color, thin as four sheets of paper, actually measures 3/4 by 1 inch

2007-08-29 14:17:10 · 1 answers · asked by p h 1 in Engineering

2007-08-29 14:15:44 · 2 answers · asked by B-Dogg 3 in Zoology

A spring is compressed between two toy cars (m1 = 120 g, m2 = 180 g), which are placed on the floor and released. It takes the spring 0.064 s to push the cars apart, after which they move directly away from each other, car 1 at a constant speed of 2.4 m/s.

(a) Calculate car 2’s speed after the spring is fully relaxed.
(b) Calculate the average force the spring exerted on car 1 while pushing the cars apart.

2007-08-29 14:13:04 · 1 answers · asked by wake up 1 in Physics

Do you think there's something in the camera or a special film that has the "aura" in it & just adds it to the picture of your aura "real" ?

2007-08-29 14:11:41 · 8 answers · asked by all4equines 4 in Other - Alternative

(1) let H be a subset of G. show that the following are equivalent.
i. a element bH
ii. b element aH
iii. aH=bH
iv. b^-1a element H
v. a^-1 element H

1. i iff ii
2. i iff iii
3. iv iff v
4. i iff v

(2) let G be a group of order pq, p and q are prime. show that every subgroup of G is cyclic.

2007-08-29 14:09:56 · 5 answers · asked by la 1 in Mathematics

A car in a repair shop is moved 2.45 m by a hydraulic lift. The work done on it by gravity is -43.9 kJ. What is the car's mass, and which way did it move?
1620 kg, down
1940 kg, up
1830 kg, up
2110 kg, down

2007-08-29 14:09:48 · 1 answers · asked by Anonymous in Physics

By willingly, I mean they weren't forced or pressured by other nations and didn't have to force their own people by passing and enforcing laws.

In how many countries was the metric system simply accepted based on its own merits. Not just by scientist, engineers, teachers and politicians, but by the nation as a whole.

2007-08-29 14:09:25 · 1 answers · asked by atomzer0 6 in Other - Science

An 950-kg motorcycle drives east at 12 m/s, and an 1840-kg car drives west at 8.0 m/s. Calculate the total momentum of this two-vehicle system, assuming east is the +x direction.
-2100 kg m/s
-3300 kg m/s
-4900 kg m/s
-5600 kg m/s

2007-08-29 14:07:57 · 1 answers · asked by Anonymous in Physics

You have a closed shoe box with two strings protruding from either side. By pulling on the right string you can pull out 60cm of string. By pulling on the left string you can pull out 6cm of string. *When you pull on either string the opposite string disappears into the box, before you actually pulled out the said length. How is this possible? What is inside the box that causes this? Please Help!!!

2007-08-29 14:06:58 · 2 answers · asked by Soccer37 2 in Physics

Some poultry farmers believe that feeding antibiotics to poultry will help fatten the birds, is it true?
Are there any hazards to the general public?

2007-08-29 14:06:40 · 4 answers · asked by charlie brown 1 in Zoology

A pulley is attached to the ceiling. Spring scale A is attached to the wall and a rope runs horizontally from it and over the pulley. The same rope is then attached to spring scale B. On the other side of scale B hangs a 120-N weight. What are the readings of the two scales A and B? The weights of the scales are negligible.

These are the choices I have narrowed it down to:
A.) A reads 0; B reads 120N
B.) Both scales read 120N
C.) A reads 120 N; B reads 0

2007-08-29 14:04:49 · 2 answers · asked by triciawin87 2 in Physics

Can some one help me? i need the Temperature record for Seoul , South Korea.i need the hottest and the coldest temeperature. i need it bye next week on the 4th. thanks.

2007-08-29 14:01:46 · 3 answers · asked by RandomKid 1 in Weather

Interested in buying products

2007-08-29 13:54:05 · 3 answers · asked by Anonymous in Medicine

ok, i really, need helpw with these two geometry questions. theyre supposed to be proofs, but i just need the steps it takes to get the right answer.

GH= z+6
EH= 2z - 4
GE= z
no clue how to set it up, i had (z+6)+(2z-4)=z but that didnt wrk...
and:
m<1= 7x + 3
m<2= 6x + 7
couldnt solve it

please help! thanks!

2007-08-29 13:52:32 · 3 answers · asked by Shorty 2 in Mathematics