Science & Mathematics - 9 December 2007

i need it before 12/10/07

2007-12-09 09:45:06 · 1 answers · asked by Intellectual 1 in Mathematics

Ex: How did Mercury get its name and why? Thats how the question is posed for each planet.

2007-12-09 09:44:51 · 11 answers · asked by AJ M 2 in Astronomy & Space

And if so, does it point towards the earth or towards the sun?

2007-12-09 09:42:27 · 3 answers · asked by Roy Nicolas 5 in Physics

I really want to be a storm chaser. I used to be terrified of tornados but for the past few years I have found them to be completely fascinating. I love storms and even though I've never truly studied them I know enough about them to know all about tornados and how they form and all of those "scientific" things about tornados.

I want to become a storm chaser. Do you have to go to college for this? If so, how long and what kind of things do you have to study? How much (roughly) does it pay?

2007-12-09 09:40:46 · 4 answers · asked by adrian♥ 6 in Weather

Benj can travel 6 mi downstream in his canoe, with the current in the same amount of time he travels 2 mi upstream against the current. If the speed of the current is 2mph, find the average rate of the canoe in still water.

Answer is 4 mph, but i dunno how to set this up)

2007-12-09 09:40:36 · 2 answers · asked by Anonymous in Mathematics

2007-12-09 09:36:38 · 1 answers · asked by summer yeung 2 in Earth Sciences & Geology

Plz tell me what you know about these four satellites/balls/planuts/wtv.

2007-12-09 09:36:26 · 2 answers · asked by Roy Nicolas 5 in Astronomy & Space

The domain is all real numbers but I need the range. HELP!!
f(x)= -x^2 +3x-5

2007-12-09 09:36:09 · 4 answers · asked by Sponge 3 in Mathematics

Hey I'm really confused! Please help, I have no idea where to start in even working this out!

A particle A of mass m travelling with a velocity v0 collides with a stationary particle B of mass 4m. After the collision, A travels at right angles to its original direction with speed v1 and B moves with speed v2at an angle of 60° to the original direction of A.

Show that after the collision v2 = [v0/(2sqrt3)] and find an expression for v1

Write down expressions for the total kinetic energies before and after the collision in terms of m and v0. Hence show that the ratio of final to initial kinetic energies is 2/3

Is the collision elastic or inelastic? Explain your answer.

2007-12-09 09:36:00 · 2 answers · asked by Hayley* 3 in Physics

Ok if the definition of an AMU is 1/2 of the mass of a C-12 atom, then why aren't all nuclear masses round even decimals? This shows that no two protons and neutrons are the same size does it not? If they are the same masses, then what accounts for all the decimal parts of the atomic masses? Look on any table that gives nuclear masses in amu's. C-12 has a mass of 12.000000 but that is the only round one. Why?

2007-12-09 09:35:03 · 3 answers · asked by Anonymous in Physics

Also add the parts so i know what to buy, and also show the steps to make it.

2007-12-09 09:31:22 · 2 answers · asked by Bob S 1 in Physics

I'm studying for a math test and can't figure out this question.

at a recent election where 5,222 votes that were cast for 4 candidates. then Victor exceeded his opponents by 25,33,and76 votes. find the number of votes received by each candidate.

2007-12-09 09:29:34 · 6 answers · asked by thinkpink020 1 in Mathematics

a) 2.7 ft
b)8.8 ft
c)13.2 ft
d)132 ft

2007-12-09 09:27:56 · 7 answers · asked by Anonymous in Mathematics

2007-12-09 09:27:17 · 1 answers · asked by khaotic lil devil 1 in Earth Sciences & Geology

Very important I find this out!

2007-12-09 09:26:27 · 3 answers · asked by Anonymous in Mathematics

How do I break the ice on my satellite dish? The ice is messing with my channels so I can't watch TV. Can I poor boiling water on it? It's like 10 degrees outside so, will it ever melt?

2007-12-09 09:25:03 · 5 answers · asked by Anonymous in Weather

i love the snow but where i live i get a bit to much. it's really pretty though living in the mountains but it is hard to get around. our car gets stuck in the snow so i guess it's nice having a truck. it's weird though there was no snow and then about 3 days ago it started snowing like crazy.

2007-12-09 09:24:25 · 41 answers · asked by jordyn k 1 in Weather

2007-12-09 09:23:16 · 4 answers · asked by Zhelyz 2 in Zoology

1. Elements in the middle of the periodic table are known as these kinds of metals...
-rare earth metals
-noble
-transition
-naturally

2. These gases are considered inactive. They do not react with other elements...
-rare earth metals
-noble
-transition
-naturally

3. For convenience, these are placed at the bottom so the periodic table does not become too wide to be represented in chart form...
-rare earth metals
-noble
-transition
-naturally

4. There are 92 elements, from hydrogen to uranium that occur in this manner...
-rare earth metals
-noble
-transition
-naturally

2007-12-09 09:21:01 · 4 answers · asked by Anonymous in Chemistry

[1/(x-1)]+[1/(x+1)]
all over
[2/(x-1)]-[1/(x+1)]
equal to 1

2007-12-09 09:20:25 · 1 answers · asked by Olivia 2 in Mathematics

- 11/5+w=-4/5

What does w equal??? Its my last question and I cant get it... My calc sucks lol help!!!!!!!!!!!!

2007-12-09 09:20:22 · 7 answers · asked by Anonymous in Mathematics

If we cant see the fourth dimension of objects because of reduction caused by projection into the third dimension, does that have anything to do with why you cant see the light of a lazer until it is projected onto an object in our 3 d world?

2007-12-09 09:14:50 · 4 answers · asked by Johnny Tostado 2 in Physics

any physics out there that can answer the following questions about me?

1. wat color shirt am i wearing
2. wat type of pants
3. if i have any pets and how many
4. anyother things

2007-12-09 09:12:29 · 13 answers · asked by Just here to help 4 in Parapsychology

For some reason I am having trouble "Interpeting" it.

“The earth is not in the centre of the Sun’s orbit nor at the centre of the universe, but in the centre of its companion elements, and united with them. And any one standing on the moon, when it and the sun are both beneath us, would see this our earth and the element of water upon it just as we see the moon, and the earth would light it as it lights us”

2007-12-09 09:12:15 · 4 answers · asked by Anonymous in Astronomy & Space

what is the difference between the too

2007-12-09 09:11:53 · 1 answers · asked by Anonymous in Mathematics

2007-12-09 09:10:31 · 10 answers · asked by Anonymous in Astronomy & Space

the length of a rectangle is 4 more than twice the width. the area of the rectangle is 52.08 square feet what are the dimensions

2007-12-09 09:10:14 · 4 answers · asked by corndog 1 in Mathematics

A physics homework question :)
Uranus has a radius of 2.33e7m and is 2.87e12m from the sun. The sun has a radius of 6.96e8.

2007-12-09 09:09:18 · 1 answers · asked by Anonymous in Physics

The instantaneous rate of change for a sive wave like:
a sin (bx + k) is ab cos (bx + k)
The instantaneous rate of change for a cosine wave like:
a cos (bx + k) is -ab sin (bx + k).

So here's my question. that is only the rate of change for the function. BUT!!! For an energy wave, what is the rate of change for the speed of an energy wave? Is it the absolute value of the derivative?

2007-12-09 09:05:22 · 5 answers · asked by UnknownD 6 in Physics

2007-12-09 09:05:18 · 10 answers · asked by galaal13 3 in Mathematics