Science & Mathematics - 18 September 2006

please help

2006-09-18 14:54:23 · 4 answers · asked by Dylan C 1 in Mathematics

*for add/sub**
if i add 67.17and207.2 how may sig figs should the number have?
**for multiply/divison**
if i times 67.17 by 207.2 how many sig figs should that number have?

2006-09-18 14:52:46 · 6 answers · asked by Simply Me 5 in Mathematics

2006-09-18 14:52:08 · 4 answers · asked by pjsbirds 1 in Astronomy & Space

2006-09-18 14:51:37 · 6 answers · asked by Rachel M 1 in Chemistry

Is there any physical proof? How can the speed of light have anything to do with the amount of energy in an object.
The amount of energy in a given amount of mass may be very, very large, but is it really M X C X C?

2006-09-18 14:50:45 · 11 answers · asked by Anonymous in Physics

I need the methodology and step by step proccess of how to get the percent of fat in butter.It needs to be accomplishable by high school students.

2006-09-18 14:50:39 · 5 answers · asked by denxxchua 3 in Chemistry

help !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! please !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

2006-09-18 14:49:51 · 6 answers · asked by Anonymous in Earth Sciences & Geology

2006-09-18 14:48:51 · 1 answers · asked by Sharmin Sultana Dipti 1 in Chemistry

Proportionally, who do you think is faster? A cheetah or a common garden-variety tree squirrel?

2006-09-18 14:48:50 · 5 answers · asked by The Baron 3 in Biology

Evolution, or more poperly natural selection, says that a behavior must confer an advantage. I see no advantage in this behavior because it limits the food supply.

2006-09-18 14:44:12 · 11 answers · asked by traveler01983 1 in Other - Science

I need to solve for x. Here's the problem:

((4)/(x-3)) = ((3)/(x-4))+(1/2)

I keep coming up with x squared minus 9x + 26 = 0. From there, I've applied the quadratic formula and keep ending up with the square root of a negative number, which is obviously impossible. Can someone shed some light on this for me? Thanks a million!

2006-09-18 14:43:37 · 6 answers · asked by math dodo 2 in Mathematics

... axis of rotation is perpendicular to plane of revolution around its sun at "North Pole" and "South Pole" mid-summer. What would weather be like?

2006-09-18 14:42:28 · 4 answers · asked by zavarob 2 in Astronomy & Space

2006-09-18 14:42:15 · 3 answers · asked by Anonymous in Chemistry

2006-09-18 14:42:09 · 8 answers · asked by Anonymous in Mathematics

Like that "Man Law" commercial

2006-09-18 14:40:19 · 5 answers · asked by Chris 2 in Chemistry

limit xlnx = ?
x-->0

2006-09-18 14:39:22 · 3 answers · asked by math dodo 2 in Mathematics

What will happen when the magnetic field is gone? what well the earth look like? Won't anstroinds and other gases hit the earth and we will just be another planet with no life?
But they are saying the magnetic field will come back but I don't get what happened once it did lose its magentic preasure.

2006-09-18 14:39:20 · 4 answers · asked by Jmeシ 1 in Astronomy & Space

and please don't say a sphere!

2006-09-18 14:34:35 · 5 answers · asked by anonymoususer987876 3 in Other - Science

http://answers.yahoo.com/question/index;_ylt=AotPRUF9XvxqNCjRXfd8fHTsy6IX?qid=20060918180217AAIIhsx

2006-09-18 14:32:21 · 6 answers · asked by Anonymous in Mathematics

The question is. You have 84 cents, these are all coins. Coins have to weigh 44.5 grams. A dime weighs 2.5 grams, a penny weighs 3.25 grams, a nickle weighs 5.0 grams, a quarter weighs 6.5 grams, and a half dollar weighs 13.0 grams. Please help us, and tell us how you came up with this answer.

2006-09-18 14:30:30 · 7 answers · asked by lynnette m 2 in Mathematics

2006-09-18 14:28:18 · 5 answers · asked by Jasmine J 1 in Other - Science

I recall hearing of some source of alternative energy that was based on the motion of the waves. Basically, the waves provided the energy(no giant turbines) and these things functioned like wind mills of the sea. Everything else was blah blah. The inventor of this ingenious device was some high school or college student, I think.
Whatever it is, just tell me the name of the inventor, the name of the thing he/she made, and how it works. I may have placed this question in the wrong place because there really isn't enough about alternative energy to devote a link to. Remember, inventor, invention and how it works.

2006-09-18 14:22:31 · 3 answers · asked by Anonymous in Other - Science

Currently there are 12 people in space - 6 on the shuttle, 3 on the ISS, and 3 on their way to the station aboard a Soyuz. Has there ever been more people in space at the same time?

2006-09-18 14:20:42 · 4 answers · asked by RyanSmith 3 in Astronomy & Space

I have a TI-84 plus silver edition texas instrument calculator, does anybody know how I might be able to find Significan Digits?? Im almost sure the calculator can tell which digits are significant and which aren't.

2006-09-18 14:18:54 · 4 answers · asked by A Being 3 in Other - Science

2006-09-18 14:17:09 · 8 answers · asked by 1hotmama 3 in Chemistry

2006-09-18 14:16:42 · 18 answers · asked by Questioner 2 in Geography

Also a site where I can look up microbes or bacteria and get a real good picture of what they look like?

2006-09-18 14:12:43 · 4 answers · asked by JustGettingBy 1 in Biology

Which of the following is not a rational number?


-4
1/5
0.8333333……
0.45
v2

2006-09-18 14:12:23 · 10 answers · asked by LOLO 1 in Mathematics

Hi im only a teenager but i really like astronomy. I have a galileo FS-80 reflector. I see only stars or bright light, nothing very detailed. I have a planetarium hooked up to my computer. Can anyone tell me how I could be able to see more detailed things, besides buying another telescope. And yes I do have everything focused, and i have the lenses off. No trees are in the way. I have a 3x barlow lense, 20mm lense, 6.8 to 16mm zoom lense and tye 1.5x erecting eyepiece. I live in New Jersey where you can see a fair amount of stars. I can't look at any planets for a long time or the moon because they are all by the Sun. Except neptune, Pluto which is still a planet to me and Uranus which I no I will not be able to see. Please help me. I will appreciate it!
Thanks! : )

2006-09-18 14:11:53 · 4 answers · asked by gabi 2 in Astronomy & Space

2006-09-18 14:11:29 · 6 answers · asked by degrassi_27 2 in Chemistry