Science & Mathematics - 25 June 2007

2007-06-25 10:14:18 · 10 answers · asked by BabyCgurl123 1 in Chemistry

Why are people so suprised when their house keeps flooding if they live next to a quaint stream and all the rain absorbing fields around them have been built on.

Converting every inch of land into housing and tarmac road with very rapid rain run off straight into drains EQUALS floods. Hardly rocket science.

2007-06-25 10:11:57 · 5 answers · asked by dsclimb1 5 in Weather

i have heard maybe 3 different ways of how the univers began. i would like to know what todays theory is. thank you very much.

2007-06-25 10:09:34 · 5 answers · asked by i love my Emily 2 in Astronomy & Space

2007-06-25 10:08:43 · 14 answers · asked by Anonymous in Physics

2007-06-25 10:05:09 · 5 answers · asked by BabyCgurl123 1 in Chemistry

2007-06-25 10:02:47 · 9 answers · asked by Anonymous in Geography

2007-06-25 10:01:15 · 4 answers · asked by Anonymous in Geography

Please give a star thank you.

2007-06-25 09:57:24 · 17 answers · asked by Anonymous in Mathematics

2007-06-25 09:53:36 · 5 answers · asked by caddel 1 in Astronomy & Space

2007-06-25 09:52:48 · 44 answers · asked by snowogu 2 in Weather

I got really stuck with this can someone help, i am rotton at maths

2007-06-25 09:51:52 · 4 answers · asked by pud 1 in Chemistry

I know I have to use f= ma but im not exactly sure how and I need to study for a final.. Can someone please help??



A wheel of radius 27 cm, mass 3kg and moment of inertia 0.10935 kg m^2 is mounted on a frictionless, horizontal axle. A light cord wrapped around the wheel supports an object of mass 1.9 kg. The acceleration of gravity is 9.8 m/s^2. Find the tension T in the cord. Answer in units of N.


b) what is the angular acceleration of the wheel? answer in units of rad/s^2??

2007-06-25 09:51:10 · 1 answers · asked by Anonymous in Physics

2007-06-25 09:50:44 · 27 answers · asked by ALSISON M 3 in Earth Sciences & Geology

Help most welcome. Differentiate step by step:

1) arctan(2x)
2) e^(x^2+2)
3) arctan(2x)e^(x^2+2)

2007-06-25 09:46:21 · 3 answers · asked by Tp 2 in Mathematics

Are they're any scientists out there who have done the research and found that the universe is constant? after all the big bang theory is still just a theory. other than the big bang thoery what explanation do we have for the universe that can hold water with todays information.

2007-06-25 09:44:50 · 6 answers · asked by Armond B 3 in Astronomy & Space

4x + 1/2(12x -2) =3

2/3(x +8) =6x

2007-06-25 09:44:29 · 5 answers · asked by Jewman 1 in Mathematics

Well do they?? If so how do they have babies???

2007-06-25 09:41:30 · 5 answers · asked by savannahdoodle 1 in Zoology

I am kinda confused about this one!

2007-06-25 09:37:17 · 4 answers · asked by Justbenice 1 in Chemistry

Just checking.

ding ding ding a ling a ling.

2007-06-25 09:35:02 · 14 answers · asked by Anonymous in Biology

Please esplain.

Ding a ling a ling

(more drooling)

2007-06-25 09:32:03 · 10 answers · asked by Anonymous in Biology

After 2 very successful trials of guessing marbles in a bag, I have proven to be clair voyant. (At least that's what the book says.) So now what? Is there anything I can do to benefit ESp studies and etc.?

2007-06-25 09:29:03 · 18 answers · asked by paperclip 3 in Paranormal Phenomena

2007-06-25 09:28:28 · 13 answers · asked by Paul M 1 in Engineering

2007-06-25 09:27:58 · 3 answers · asked by annettesaxby 1 in Engineering

I'm extracting hydrogen from water by running electricity through water and it worked but how do I prove that the hydrogen gas is released? is there any chemicals or indications can show that H2 exists in my experiment?

NOTICE that the chemicals or indicators have to be something that I can buy or create otherwise my experiment wouldn't maka sense....

2007-06-25 09:25:09 · 5 answers · asked by Boptimistic!!! 1 in Chemistry

when copper is exposed to the air, it slowly turns green over a period of time. what type of change is occurring? can anyone explain.

2007-06-25 09:23:13 · 3 answers · asked by princess 2 in Chemistry

2007-06-25 09:23:10 · 5 answers · asked by black label 2 in Geography

Can an expert on the subject tell me if this is a correct hypothesis for the question above?

"The faster a gas can increase temperature/pressure, the higher the temperature estimated absolute value can be reached."

If it isn't, please provide me with something that can be written as a correct hypothesis to how estimate of absolute value varies with gas with a sufficient explanation. Thanks in advance! :)

2007-06-25 09:19:27 · 2 answers · asked by sillysalamander101 2 in Chemistry

It is a Telescience Telescope 30/60. At first I couldn't adjust my eyes to it but then finally when I was able to look through I saw things upside down and backwards. when I took the lense off it was the same thing. When I looked through the diagonal mirror it was the same thing. I have a faint recollection that this happened when I was in school but I don't remember how to resolve and the directions and looking online doesn't say anything about it - any suggestions?!!!

2007-06-25 09:13:50 · 4 answers · asked by amygr073 1 in Astronomy & Space

2007-06-25 09:12:18 · 11 answers · asked by John D 2 in Mathematics

i kind of know what a watt is but i tried to look up volt but it gives me all these definitions to god knows what it means, so in simple easy terms what is a watt and what is a volt and how are they different, also if a power plant can produce 900 megawatts of power how big of a city could that power?

2007-06-25 09:12:13 · 7 answers · asked by gopackgo51 1 in Engineering