Science & Mathematics - 18 January 2007

I think so cause we call them aliens but maybe they to call us aliens.

2007-01-18 15:43:51 · 14 answers · asked by marimar229 2 in Astronomy & Space

Marvin has 20 nickels and dimes. He has 2/3 as many dimes as he does nickels. How many nickels and how many dimes does Marvin have?

At first I thought that this had no solution, because it doesn't give enough information. Is that true?

2007-01-18 15:42:45 · 8 answers · asked by Anonymous in Mathematics

I've had a 10 hour+ headache, and my temperature measured 100+F. What do I do? It is freezing, my throat is killing me everytime I swallow, and my room is set at 68F. WHAT DO I DO? I really need to go to school tomorrow morning, and I have to wake up at 6AM :(. What can I take to help me sleep?

2007-01-18 15:42:03 · 5 answers · asked by Richard 2 in Medicine

-2xe^(-6x)+x^(2)e^(-6x)=0

2007-01-18 15:41:30 · 3 answers · asked by Anonymous in Mathematics

2007-01-18 15:41:26 · 7 answers · asked by ShiningCrimson 3 in Chemistry

Peppered moths in London changed colors over times in order to blend in with their changing environments. This is evolution in action.

What happened with the Pepper moths? How & why did the moths change? How does this phenomenon illustrate Darwin's principles of evolution? Give at least 3 principles illustrated by this example & explain your reasoning.

2007-01-18 15:40:30 · 2 answers · asked by JoAnna 2 in Biology

2007-01-18 15:40:25 · 3 answers · asked by deepak_phy06 2 in Chemistry

I always hear people trying "better" ways of converting salt water to fresh, but wouldn't boiling it and capturing the steam be an effective and viable way of doing thison a large scale? I know that the salt stays in the water when it evaporates, this is why the dead sea is so salty.I never really researched it, but to me, this would be by far the cheapest, easiest way to do it. Am I missing something?

2007-01-18 15:39:56 · 4 answers · asked by Redneck 1 in Chemistry

2007-01-18 15:39:24 · 2 answers · asked by Anonymous in Mathematics

2007-01-18 15:36:45 · 2 answers · asked by brookscabrooks 1 in Weather

^ means the following number is an exponet
/ means divide

2007-01-18 15:36:26 · 6 answers · asked by Anonymous in Mathematics

Determine the value of ab if:

log(base 8) a + log(base 4) b^2 = 5

and

log(base 8) b + log(base 4) a^2 = 7

2007-01-18 15:34:54 · 3 answers · asked by bharlem145 1 in Mathematics

why is sun at the focus of the imaginary ellipse..why nt the center or any other place in the imaginary ellipse?

2007-01-18 15:33:47 · 11 answers · asked by shreya b 1 in Astronomy & Space

2007-01-18 15:33:46 · 6 answers · asked by shootthetarget92 1 in Biology

My gf and I have been taking walks lately and there is one section of concrete in a parking lot that looks as if someone spilled water on it. I noticed that it has never dried.

What could someone put on concrete or pavement to make it look wet, and stay that way?

2007-01-18 15:32:15 · 5 answers · asked by aaron.lattin 2 in Other - Science

Ever been to Kerala. You should consider yourself lucky if you did not see the roads in a pathetic state. Mostly during monsoons and just after monsoons till the sun is up and about , the roads are in a mess filled with pot holes and crater sized holes. Why can't the state do something about this? Its the 21st century for God's sake. Any workable ideas to improve God's Own?? Country

2007-01-18 15:31:54 · 8 answers · asked by Ramesh R 1 in Earth Sciences & Geology

2007-01-18 15:30:51 · 6 answers · asked by shreya b 1 in Astronomy & Space

2007-01-18 15:30:11 · 9 answers · asked by Anonymous in Other - Science

2007-01-18 15:29:38 · 12 answers · asked by michellekyho 1 in Mathematics

2007-01-18 15:29:11 · 1 answers · asked by Anonymous in Biology

our appendix is basically useless to us, right? so i was wondering why we have one. has anyone heard or does anyone have any theories about what the use of the appendix was for early humans and if so, what are they?
we are learning about evolution in biology and i asked this question today and my teacher didn't know the answer...

2007-01-18 15:28:24 · 4 answers · asked by emily.grace 3 in Biology

I need help with my homework!!!!!!!!!!!!!!!!!!! i am so stuck on this pattern, can anyone help me please?

2007-01-18 15:28:02 · 10 answers · asked by nit_cole 1 in Mathematics

Yes i know..how dumb am i... Can anyone tell me what 90% of 717 is please?

2007-01-18 15:27:31 · 17 answers · asked by Anonymous in Mathematics

2007-01-18 15:26:38 · 5 answers · asked by res_314 1 in Astronomy & Space

/≡ - means not equivalent

If a and b are integers, we will use the notation a/≡ b (mod n) to mean that (a) is not congruent to b Modula n, using congruence modulo n where n is a natural number.
1-write the contrapositive of the following contidional statement:
For all integers a and b, if a /≡ b (mod 6) and b /≡0 (mod 6) then ab /≡ 0 (mod 6)

2- Is this statement true or false? Please explain

2007-01-18 15:26:18 · 1 answers · asked by Anonymous in Mathematics

I'm confused because I want to study engineering and I'm between electrical or civil engineering but I don't know which one I should study because electrical engineers have to take electronics courses and I hate electronics and civil engineers have to work outside and I hate the sun and the hot weather but I only like this fields of engineering.What should I study????I need an advice,What do you think????Help me to decide....

2007-01-18 15:25:29 · 15 answers · asked by The Apostle 2 in Engineering

It used to be common wisdom to build cars to be as rigid as possible to withstand collisions. Today, though, cars are designed to have “crumple zones” that collapse upon impact. What advantage does this have?

2007-01-18 15:25:23 · 7 answers · asked by ? 2 in Physics

Im currently in College precal and I just started today well anyways I pretty much know how to do ...... Factoring,extraction of roots, and quadratic formula. Im just practicing the "completing the square method" to better myself but for some reason I dont get the answer the same in the textbook.

The problem is:
2r^2+10r+11=0

Well this is what ive done so far....
r^2+5r+25/4= -22/4+25/4
(r+5/2)^2= 3/4
but for some reason i end up with...
r= -5/2 +or- Square root of 3/4 as my result

but my pre cal book has it as... r= (-5 +or- square root of 3)/2

What am I doing wrong? Am I not simplifying right? Did i miss a step? Well after my end result I dont know what to do.

Thank you for everyones time.

2007-01-18 15:25:08 · 2 answers · asked by Anonymous in Mathematics

dont ask why. i've tried, i just cant! i always take the liquid form of medicine
im 15 and my mom says its really stupid how i dont know how to take pills and that im probably gonna end up being the only 30 year old thats still afraid to swallow a pill.
i know thats not true but just to make sure... does anyone here not take pills too?
;(

2007-01-18 15:24:27 · 9 answers · asked by sofia 3 in Medicine

2007-01-18 15:23:52 · 3 answers · asked by Anonymous in Geography