Science & Mathematics - 5 January 2007

Thanks for your answer...Tom Science 4

2007-01-05 11:31:19 · 2 answers · asked by Anonymous in Astronomy & Space

for my science fair project i am doing something with magnetic fields, is a magnetic field just made by one magnet? or is it made by two magnets clashing on opposite polls. or am i looking at this wrong?

2007-01-05 11:30:13 · 5 answers · asked by aaronator 3 in Other - Science

Identify the products and write a balanced equation for the following neutralization reaction. It will be a double displacement reaction with water as one of the products.

HCl(aq) + Ca(OH)2(aq) ------->

2007-01-05 11:27:02 · 5 answers · asked by nice too meet you. 4 in Chemistry

Whats the statistical aproach to knowing this?. I have heard its very comon for scientist the need of this , and It would be perfect in my own experiment.

2007-01-05 11:26:53 · 3 answers · asked by vatsq 2 in Other - Science

2007-01-05 11:25:55 · 4 answers · asked by ryan s 1 in Biology

for example if 8 peopele fall in the ranges of 18-24years,6 people fall between 25-30 and 6 people fall between 31-35years, how do you calculate the average age range

2007-01-05 11:25:28 · 4 answers · asked by jomo7125 3 in Mathematics

k^4-5k^2+4
I can't figure this out.

2007-01-05 11:18:21 · 10 answers · asked by z1 2 in Mathematics

2007-01-05 11:18:05 · 11 answers · asked by aloreefy 1 in Chemistry

This question has stumped all my teachers since the 8th grade. So I thought I'd try here.

2007-01-05 11:17:49 · 8 answers · asked by Sean G 1 in Other - Science

I have to remember a bunch of polyatomic ions by this coming tuesday, and i would like to know the easiest way to do so. I made flashcards but that usually only helps me if i know some of them and i don't know ANY. an example of what i need to know is that
Ammonium symbol is NH(little)4+, and vice versa, and stuff like that. Please help me, and thank you for those who answer! :)

2007-01-05 11:17:45 · 3 answers · asked by Paul B 1 in Chemistry

2007-01-05 11:17:43 · 3 answers · asked by t s 1 in Weather

I need to make a punet square for something. This is what my teacher said after she said punet square. Make a dihibrate cross to illustrate the Principal of Independant Assortment. One parent with Rr and Dd crosses over with another who has exactly the same Rr Dd. I dont get what I'm supposeed to do. I also need to write the genotypic ratio and the phenotypic ratio. It's due on Monday. Tnks.

2007-01-05 11:17:05 · 2 answers · asked by xx love$$sin xx 3 in Biology

The mean of 21 scores is found to be 73. Later, I discovered that this mean 73 is incorrect because one score was incorrectly reported as 66 in stead of 84. Now you state the correct mean. Report answer rounded to two decimal places.

2007-01-05 11:16:58 · 8 answers · asked by kwilliam21239 1 in Mathematics

In a physics class i remember my teacher trying to explain the idea of the atomic clock actually slows down and is behind the atomic clock left on Earth after it's been flying around in space for a while... and obviously to many black faces
But i also remember me asking is that do to with the clock or actualy time (a constant) slowing down?

If identical twins were seperated at birth, one being sent to space for 20 years, and the other living on Earth, when the twin returned, would it actually be physically and mentally younger?

And then if this is true: If time slows down when they were in space, it would constantly be ticking along slower, so wehn they come back to Earth, how does the time in space speed up and catch up the time on Earth?

Sorry if this is too long, im just curious
Thanks

2007-01-05 11:16:48 · 8 answers · asked by Anonymous in Physics

Somebody help me.....I can't find it...........And it's also my prelims tommorow......

2007-01-05 11:16:16 · 2 answers · asked by gio 1 in Mathematics

How much time would pass in a rocket from here to Alpha Centaury where the occupants experience 1G of acceleration up and 1G of acceleration down?

2007-01-05 11:10:32 · 2 answers · asked by Bedam 2 in Astronomy & Space

located 1800 m down shore from the closest point. If she swims @ 4m/s and she walks 6 m/s, how far fomr the cottage should she come ashore so as to arrive at the cottage in the shortest time?

2007-01-05 11:10:27 · 8 answers · asked by Anonymous in Mathematics

2007-01-05 11:06:51 · 15 answers · asked by Greg 1 in Weather

me?

2007-01-05 11:05:45 · 4 answers · asked by Aces 3 in Chemistry

The theory of relativity says that if you were able to move away from the earth at close to the speed of light that when you return much more time would have passed on earth than you would have experienced. Why? It seems like if you were moving that fast that others would be moving slower relative to you, not faster. Can anyone explain in layman's terms?

2007-01-05 11:01:36 · 11 answers · asked by Stew88 1 in Physics

we have carbon dioxide already in our bodies, but is that the only factor that "makes" us carbon based.

2007-01-05 11:01:13 · 4 answers · asked by jose s 2 in Biology

I heard small meteorites and other debris from space hit Earth a few times each day. I heard of properties being damaged but I never heard of anyone being killed by one. Has there ever been a documented case?

2007-01-05 11:00:34 · 3 answers · asked by FrozenCloud 3 in Astronomy & Space

I heard small meteorites and other debris from space hit earth a few times each day. I heard of properties being damaged but I never heard of anyone being killed by one. Has there ever been a documented case?

2007-01-05 10:59:44 · 7 answers · asked by FrozenCloud 3 in Astronomy & Space

The sum of the digits is 8. The product is 12. The number is between 30 and 90.

2007-01-05 10:57:34 · 15 answers · asked by sheila d 1 in Mathematics

Is a Black Hole, an actual 'hole' in the fabric of space like its name suggests? Or is it simply an extrememly dense ball of mass? And if so, what happens to all the matter and radiation that gets pulled to it? Where does it go?

2007-01-05 10:57:13 · 13 answers · asked by Anonymous in Astronomy & Space

I have heard that the rate of rotation of our planet is receding. So I assume that at some specific time our planet will stop rotating. I wonder what could happen next. Will it still circle the sun or is it also possible that the rotation will reverse?

2007-01-05 10:56:39 · 13 answers · asked by alhabib 1 in Astronomy & Space

2007-01-05 10:55:48 · 1 answers · asked by d122296 1 in Weather

2007-01-05 10:55:20 · 2 answers · asked by ‬‬∞ LΘVΞ -stuff- 2 in Engineering

2007-01-05 10:50:45 · 5 answers · asked by rooie 1 in Astronomy & Space

I was wondering if animals can acually cry. Are they able to produce tears like us?

2007-01-05 10:48:58 · 13 answers · asked by rockangel_72 2 in Zoology