Science & Mathematics - 27 December 2007

Im sure this is a stupid question, but is an atom indivisible? I thought that it could be split, thus causing an atom bomb, but I really am not sure...Thank you

2007-12-27 10:14:01 · 7 answers · asked by melpatel1 3 in Physics

2007-12-27 10:10:15 · 10 answers · asked by Thanks for the Yahoo Jacket 7 in Zoology

what is the derivative of this?

y(x^3) -2(y^2)x=4

2007-12-27 09:56:14 · 2 answers · asked by Haya 1 in Mathematics

How is the ecosystem maintained in each one?

2007-12-27 09:55:35 · 2 answers · asked by Anonymous in Biology

if (x^2)[(ln^2)(x)], then what does y'=?

i'm especially confused with the ln squared...how do you multiply with that?

2007-12-27 09:51:17 · 1 answers · asked by Haya 1 in Mathematics

a season record for the bulldogs baseball team is shown. what percent of games did the bulldogs win?

the won 7 games, loss 5 games and 3 ties

2007-12-27 09:47:18 · 6 answers · asked by Anonymous in Mathematics

If you don't know the answer to the question, then please don't guess. Thankyou.

A beach that has an abundant sand supply is said to be a "healthy" beach.

True or False

If possible, please explain

2007-12-27 09:46:57 · 3 answers · asked by Navya 2 in Biology

Until I'm able to settle down in 18 months, I bought a Celestron NexStar 130mm (650mm FL) reflector telescope that is portable for drives in to the country. I want to pick up some new eyepieces and have absolutely no problem spending extra given that within two years I plan on investing in a much better (and less portable) device.

The Celestron website recommends I buy X-Cel series eyepieces for my current telescope, but they seem to put the eyepieces in rough price categories with parent scopes, and this method seems more of a money grab to me.

Basically, I would rather buy the best (for example) 8mm eyepiece I can, so I can use it with future telescopes, but just want to make sure that these better eyepieces won't cripple my current viewing.

From what I understand, a poor eyepiece will ruin a great telescope, and a great eyepiece will bring out the most of your scope, but is there really such a thing as simply 'too good' an eyepiece?

Thanks for any and all opinions!

2007-12-27 09:43:12 · 2 answers · asked by alex m 1 in Astronomy & Space

Some people manage square root signs, powers and all sorts, while I struggle with ^2 and sqrt and log(base3).
Can anyone show me how to do it, please?

2007-12-27 09:42:42 · 7 answers · asked by Anonymous in Mathematics

The resistance of these incandescent light bulbs was 8.90 ohms on the average (+/- 0.251 ohms if you want to split some hair):
a) How much current will the bulb consume on the average if I plug it in a 120 V circuit?
b) How much current will the bulb consume in a 12.0V circuit?
(Values are in RMS)
How do I do this problem?

2007-12-27 09:39:47 · 10 answers · asked by Edward 7 in Physics

Which would be better for improving the air quality in my room: an electronic air cleaner/filter/environizer/purifier/ , or a capable plant? Various manufacturers claim the air filters can greatly remove dust, pollen, pet dander, and so on. However, various botanists claim that the best plants can also purify the air quite well, while also providing extra oxygen when the plants are exposed to sunlight (and, also, that the oxygen plants consume when not photosynthesizing is relatively very little). I am interested in improving air quality in my room, and appreciate any input on what is best.

Note that I have no respiratory conditions, aside from mild seasonal allergies. The room size is roughly 10' by 17'. The room's double-window faces West, so sunlight shouldn't be a problem. If other details are required for this question, please let me know.

2007-12-27 09:35:50 · 4 answers · asked by Silvio I 3 in Botany

Me, too!
While I've still got the floor...
Will the world end in 2012?
Is there a comet the size of Ethiopia going to obliterate us?
Should my socks match if I'm just staying home?
Which way is up?
How much does red weigh?
Are aardvarks?
How come?
Where?
Would you help me tie my widget?
Wassupwitdat?
Do ya think there's any?
Oops! There it went again...
Toenail clippings?
How come the moon always looks like the moon?
Does the space between my ears ever end?
Why is oil oily?
Why is a duck?
Am I crazy?
Are You?
Is there such a thing as being 'kinda pregnant'?
Why do birds suddenly appear?

You guys getting my point?
Cheers!
Bobby

2007-12-27 09:34:52 · 12 answers · asked by Bobby 6 in Astronomy & Space

I have down's

i knew i had downs since i was born and all my life people have been saying things to me like Hey buddY! you will never play soccer


watch as be amazeed at i prove em wrong




Y = x^2

dy/dx =2x




I did it

its not maginc and i proved ppl wrong

i have to go now cause my mom is buying me dinner
to celebrate

2007-12-27 09:34:14 · 5 answers · asked by Anonymous in Mathematics

i actually did try and do this problem, but i think im just.. really wrong.. so i need help. ... and this is my first time to do anything with the exponent 'law' so it would be nice if you could give me 'hints' or somthing to solve this sorta problem.

how would i simplify 12x^9 / 4x^4

2007-12-27 09:29:24 · 9 answers · asked by :D 5 in Mathematics

2007-12-27 09:29:11 · 18 answers · asked by bigbody38117 1 in Geography

I have to write a childrens book on the water cycle but there is 2 things I dont know 1. What to name the book 2. What should the pics. look like?
Please help :-)

2007-12-27 09:29:10 · 2 answers · asked by drop . dead . emily . 4 in Biology

2007-12-27 09:25:38 · 2 answers · asked by Anonymous in Chemistry

dy/dx=x-2/x



i got an answer of y=x-2lnx+ c and the back of the book says it's y=x-lnx^2 + c and idk how they got the squared. thanks

2007-12-27 09:17:54 · 6 answers · asked by bb 4 in Mathematics

2007-12-27 09:12:58 · 7 answers · asked by humble.earthling 2 in Physics

2007-12-27 09:07:42 · 6 answers · asked by Anonymous in Physics

I'm doing an online quiz, and I can't seem to figure this part out.

http://www.sciencecourseware.org/VirtualEarthquake/php/ComputeDistance.php

Can anyone tell me/walk me through on how to find the KM of how far the epicenter is and the S-P interval?? Don't give me the answer, I just want to figure out how to do it, it's impossible for m. -_- Thanks!

2007-12-27 08:59:49 · 2 answers · asked by Anonymous in Earth Sciences & Geology

When you look at a bright light through a window (or lense), what causes that light to appear to give off a star-like glare?

I've been searching the internet for the answer, but I haven't found much because I am not quite sure what that phenomenon is called. And so far, all of the keywords I have tried using haven't provided much help.

The only thing I really know about it is that, in photography, if you take a picture of a bright light using a small aperture, you can capture this effect. However, I noticed that you can also observe this effect when looking at a bright light through a window (specifically a windshield).

I want to figure out how/why this happens because I am trying to work out an art project (involving glass panels) in which I may want to intentionally use this effect.

Any help would be appreciated. I think that perhaps microscopic imperfections in the glass may have something to do with it, but I am not sure.

Thanks!

2007-12-27 08:58:36 · 2 answers · asked by Anonymous in Other - Science

How would 7/c - 3/d divided by 4/d be simplified?

Thanks for the help!
10 points for the clearest answer!

2007-12-27 08:52:45 · 10 answers · asked by Simon F 2 in Mathematics

Or maybe someone that you know has been lost in the desert, jungle etc, and had to eat spiders/snakes to survive. I`ve been watching Bear Grylls in the desert, just wondered if these types of survival programmes have actually helped anyone?

2007-12-27 08:52:34 · 7 answers · asked by Loobyloo 3 in Zoology

If the EM spectrum is about 3Hz - 300EHz, and light is only 300THz-800THz, a very, very small sliver. Then do photons (quanta) also exist in the other frequencies?

2007-12-27 08:50:57 · 8 answers · asked by Anonymous in Physics

2007-12-27 08:50:01 · 9 answers · asked by alan s 2 in Zoology

i really need help with these problems

r=3s
r=10-4s

x=3y-4
2x-y=7

y=2x-5
x=2-4y

2007-12-27 08:49:41 · 4 answers · asked by Lindsay G 2 in Mathematics

A) x/ (ln2x)
B) 1/ (x(ln 2x))
C) 1/ (ln 2x)
D) 2/(ln 2x)
E) 1/ (ln (ln 2x))

2007-12-27 08:46:51 · 7 answers · asked by Anonymous in Mathematics

I am in 8th grade. I want an interesting topic, but not something that has to do with animals or other dangerous things. The topic that interests me is about food, (maybe something about eggs and soda or something like that). Its not due until January, but I want to start early.
Happy Holidays! I will appreciate it if someone helped me. Thanks. =)

2007-12-27 08:46:13 · 5 answers · asked by Anonymous in Earth Sciences & Geology

2007-12-27 08:44:51 · 22 answers · asked by Anonymous in Other - Science