Science & Mathematics - 6 February 2007

A perticle moving throught a gas at a speed of 45.8 m/s strikes one wall of the container, bounces off and hits the other wall 25cm away. How long did it take to go from one wall to the other?

2007-02-06 07:37:03 · 2 answers · asked by Ashboo 2 in Physics

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how do you balance equations?

i need help with all of the steps

2007-02-06 07:34:42 · 1 answers · asked by ruger5al 2 in Chemistry

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Needing to find the formula weight?

of C12H22O11 in amu.

What I did was multiply the number of each element x it's atomic mass: 6(12.0 amu) + 22(1.0 amu) + 11(16.0 amu) = 342.0 amu but when I put this answer in, the answer key tells me it's wrong! What am I doing wrong??

2007-02-06 07:34:32 · 3 answers · asked by DJ 1 in Chemistry

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how do i complete the square?

2007-02-06 07:34:24 · 4 answers · asked by skyler561 1 in Mathematics

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Do you doubt, as some, that in the 64's the man was on the Moon?

I heard that the story which says that N. Armstrong and others did not go to the Moon, but to a movie trailer... studio, only to show to the Russian that they were in advance ...

have you heard of this "theory"?

There was a trembling flag and the voice was delayed... what do you say about that?

2007-02-06 07:34:06 · 6 answers · asked by Anonymous in Astronomy & Space

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degree or radian?

is a degree or a radian the larger unit of measure?

2007-02-06 07:32:48 · 6 answers · asked by confused 2 in Mathematics

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If energy can be converted to mass, and heat is energy, then does heat have mass? Does it have weight?

2007-02-06 07:31:31 · 3 answers · asked by Joe 4 in Physics

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What kind of transformer do I need for electrical appliances in England?

2007-02-06 07:29:37 · 6 answers · asked by Cheryl R 1 in Engineering

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the Big Bang?

supposedly the planets are getting farther apart from each other, how do we know that they aint just getting older and fading? for example my teacher showed us these pictures over a 10 year spand of the glaxies are getting farther apart, i argued the statement with this question, how do we know that they are getting farther apart not just getting older and fading, he said because of amount of years there wouldnt have been a noticable difference in the stars age. But I said these Galaxies are thousands to millions of light years away, so over ten earth years these stars could be 10 thousand to 1o million years old or older in just 10 earth years...

(im not very good at wording this sorry)
(im a freshmen)

2007-02-06 07:28:08 · 9 answers · asked by Renée 2 in Astronomy & Space

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approximately how long will it take for light to travel from the sunn to th moon?explain your answer.?

this is a physics question.and i need some help on it so if you could help that would be great.thankyou.

2007-02-06 07:27:50 · 5 answers · asked by Anonymous in Physics

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Structure and Function of Proteins?

I am looking for somebackground info on this area and any good related websites. i would like to learn more on this area of proteins, espeically the monomer and polymer structures. Also the relationship between the structure and functions
thank you

2007-02-06 07:27:01 · 4 answers · asked by Sars 1 in Chemistry

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to be a doctor, what should your high school grades and classes be like?

1. about what should your high school GPA be?
2. what kind of classes should you take?
3. how difficult is it to get into med school?
4. if you want to be a personal trainer instead, is it still hard to get into a school for that?

2007-02-06 07:23:08 · 7 answers · asked by Tom G 1 in Medicine

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Is it true everything is made up of energy, including us?

I heard that light is energy and so is everything else so are we nothing but particles energy?

2007-02-06 07:22:38 · 7 answers · asked by Believe me 3 in Physics

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Isn't all this talk of black holes and anti-matter just a load of fuss about nothing?

2007-02-06 07:21:05 · 3 answers · asked by Anonymous in Astronomy & Space

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What is the relationship between the exterior angle at a vertex of a polygon?

If the interior angle is 45degrees, what is the exterior angle? If the exterior angle is 36degrees, what is the interior angle? i need some help with this.

2007-02-06 07:19:25 · 3 answers · asked by chris102188 2 in Mathematics

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places 32 meters above sea level in south west?

2007-02-06 07:18:51 · 4 answers · asked by kev_jg21 1 in Geography

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True or false?

plz if you can answer true or fulse
1. 5km is approximatley equal to 8 miles
2. 2006 is a leap year
3. the area of a circle is 2 # r2
4. 72.5% is the same as 5/8
5. there are 9 square feet in a square yard
6. 9/16 is just more than 1/2
7. v.a.t is charged at 17.5 % in the u.k.
8. the probability of a certaintly is 1
9. 1/3 is approximatley 22 divided by 7

test complete

2007-02-06 07:18:15 · 26 answers · asked by Anonymous in Mathematics

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what is the source of sand containing...basalt, olivine, and volcanic gass?

2007-02-06 07:18:11 · 4 answers · asked by Anonymous in Earth Sciences & Geology

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what was NASA's reply for those who say no one has ever been to the moon?

2007-02-06 07:17:29 · 8 answers · asked by Anonymous in Astronomy & Space