Science & Mathematics - 12 December 2007

How does a sound change if its source moves towards you, passes, and then moves away from you?......Which electromagnetic wave interacts the most with matter? Why?.......what is the significance of each of these sounds 0dB 100dB 120dB 200dB....best answer too answer that sounds most accurate

2007-12-12 15:24:11 · 1 answers · asked by Jim J 1 in Physics

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My goal is to become a botanist, but do I ever have to take Chemistry again in college?

I am a senior taking Chem II AP. It's okay, and i have an A in that class, but the thing is is that i don't have any passion or drive for chemistry. I was just taking it as a sort of "oh well, i'll never take it again EVER, so let this be a last farewell".

You see, my passion is biology, especially botany. I want to become a botanist, but i read somewhere that most botanists minor in chemistry. Can someone clear this up? do i have to minor in chemistry to become a successful research botanist?

2007-12-12 15:22:07 · 6 answers · asked by Samantha 3 in Botany

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The correct spelling of a word for letter writing material is?

A. stattionery.
B. stationary.
C. stationery.
D. stashunery.

2007-12-12 15:21:43 · 5 answers · asked by *~*Nickie*~* 1 in Geography

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Any ideas please?

The interval [0,5] is partitioned into n equal subintervals, and a number, xi is arbitrarily chosen in the i^th subinterval for each i. Then lim n
n--> infinity ∑
i=1 (6xi-3)/n

2007-12-12 15:15:45 · 2 answers · asked by sporty 1 in Mathematics

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Why are main sequence stars near one solar mass considered by mnay astronomers to be the BEST candidate for...

supporting planets that have given rise to intelligent lifeforms??

Please be specific if you can. Thank you.

2007-12-12 15:11:10 · 4 answers · asked by Anonymous in Astronomy & Space

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Can anyone tell me about a star in the early evening sky?

There is a bright blue star I saw tonight. It's quite bright and twinkles way more than all the others. I'm saying where I live so I can best decribe where it is with my limited knowledge of the sky. I live in Gulf Shores, AL. It is in the Southeastern part of the sky. Not way up, but not real close to the horizon either. Not a lot of other stars around it. Even with the din of light from my town, it is quite bright. It also has tinges of red when it twinkles. Does anyone know what I'm seeing? I'm very intrigued.

2007-12-12 15:10:10 · 4 answers · asked by Robert O 7 in Astronomy & Space

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Why has Quebec's population?

only gone up by about 1 million in the last 21 years ?

in comparison British Columbia's population increased from 1.4 million to 4.4 million.

Toronto GTA went from 3.4 million to 5.5/6 million (with 8 million in the golden horseshoe area).
Montreal has been a popular city why hasn't it seen as much growth ?

2007-12-12 15:08:15 · 2 answers · asked by grmike28 1 in Geography

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exponets math help plz?

how would you do (3/2)^ -3
basicly 3 over 2 in parenthesees to the negative 3rd power
10 points to the first correct ansere

2007-12-12 15:08:03 · 4 answers · asked by Anonymous in Mathematics

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Good info to how CO2 have affect with hurricanes in our atmosphere (for project)?

What are good sites for this project, our question was " How does CO2 affect hurricanes and frequecies ". I don't understand the frequency part but its something like how CO2 in the atmosphere affects hurricanes. More like does it affect it or not and if it does what is needed in order for it to happen. I have been searching for information and couldn't find anything good. Hope you guys can help me!

2007-12-12 15:05:13 · 2 answers · asked by sazzyoranger 3 in Earth Sciences & Geology

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what animals go through natural selection?

we have a project about natural selection and the 6 steps that go with it and my teacher told us not to use giraffes and darwins finches because we went over that in class?
Any animals that are easy?

2007-12-12 15:04:57 · 3 answers · asked by vanessa h 1 in Biology

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What is wrong about this statement?:"The whole idea of the atomic nucleus is pretty ridiculous. If...?

...an oxygen nucleus consists of eight protons and eight neutrons, the charge on the nucleus is positive. Since even I learned that like charges repel, such a nucleus would find itself repulsive and quickly fall apart"

2007-12-12 15:04:23 · 9 answers · asked by G@BY 1 in Astronomy & Space

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Do you think your "conscience" is really your spirit guide..or a spirit?

Someone mentioned this in my other question. We used to be told to "listen to" our conscience. Can a conscience talk? I don't think so. So that "inner voice"...is it just a feeling or a voice? So if most of us were taught to listen to it...why do people say people are schizophrenic when they hear voices? Do you think that parents and teachers and churches shouldn't be allowed to tell kids to listen to their conscience(since it's said to be a mental illness.)

2007-12-12 14:57:01 · 14 answers · asked by Deenie 6 in Paranormal Phenomena

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Why are astronomers much more interested in the luminosity of a star than its apparent brightness?

Please help!

2007-12-12 14:55:42 · 4 answers · asked by G@BY 1 in Astronomy & Space

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Where did I go wrong?

4m-4=4m
square both sides
(4m-4)^2=(4m)^2
16m^2-32m+16=16m^2
subtract 16m^2 from both sides
-32m+16=0
-32m=-16
m=1/2

2007-12-12 14:54:42 · 9 answers · asked by Anonymous in Mathematics

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centripetal acceleration?

What is the centripetal acceleration of a body moving in a circle of radius 10.0 m at at constant speed of 5.0 m/sec?

a. 2.5 m/sec^2
b. 0.5 m/sec^2
c. 12.6 m/sec^2
d. 0.4 m/sec^2

formula?
please try to explain this problem thoroughly....please

2007-12-12 14:54:07 · 1 answers · asked by Anonymous in Physics

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Anybody seen a paranormal activity or has it in their house?

2007-12-12 14:54:00 · 9 answers · asked by Michael E 1 in Paranormal Phenomena

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Consinder the conversion of 1-butanol to each of the compounds hown below. In which conversion.....?

QUESTION CNT... is an oxidizing agent needed?
1)CH3CH2CH=CH2 2) CH3CH2CH2CH2Br 3) (CH3CH2CH2CH2)2O 4) CH3CH2CH2CH=O

Thank you.

2007-12-12 14:49:37 · 2 answers · asked by Anonymous in Chemistry