Science & Mathematics - 9 October 2007

is there anything left to learn, discover or explore or have we learnt and found out all we can about the earth? what happens if a new discovery been made?

2007-10-09 23:59:31 · 16 answers · asked by cgoodchild 2 in Geography

I know the obvious reasons like it feels good, helps you feel closer to the object of your affections etc. But is it an instinct? It seems to come naturally, yet through evolution does it have any particular use as such (we instinctively know to 'mate' but this has enabled our species to continue, kissing seems extraneous)?

2007-10-09 23:51:15 · 11 answers · asked by incogno 1 in Biology

2007-10-09 23:38:50 · 9 answers · asked by chittaranjan r 1 in Mathematics

??

2007-10-09 23:37:03 · 11 answers · asked by cucumis_sativus 5 in Zoology

2007-10-09 23:36:35 · 8 answers · asked by Jessica Nicole M 1 in Mathematics

2007-10-09 22:58:12 · 7 answers · asked by veturi m 1 in Engineering

hi guyz

Can any one help me in this

Find b if the coefficint of x^11 in the expantion (x^2 +1/bx)^10 ????

2007-10-09 22:57:24 · 2 answers · asked by Kelly 1 in Mathematics

Let n be a natural number greater than 1, and suppose we have n people boarding a train carriage that has n seats, each passenger having a ticket which designates the seat in which they are supposed to sit. The first person to board sits in a seat randomly chosen. From then on, a passenger sits in their designated seat if it's available, and if not, sits in a seat they choose at random.

What is the probability that the nth person sits in the seat designated by their ticket? To win the points, provide a proof.

2007-10-09 22:33:15 · 3 answers · asked by MHW 5 in Mathematics

Plus when the doctor writes on the script to take " tds pc" . Or now that I'm on a role how about _take 1 bd?

2007-10-09 22:32:09 · 1 answers · asked by Brett Neil 1 in Medicine

2007-10-09 22:30:01 · 1 answers · asked by ? 3 in Biology

2007-10-09 22:22:04 · 2 answers · asked by Anonymous in Mathematics

can we use absolute ethanol replace the use of 50% ethanol by jz diluting it to 50% ? will the result same as we use 50% ethanol? how much of WATER should be added to absolute ethanol to make 50% of 500ml ethanol?

2007-10-09 22:11:31 · 3 answers · asked by Anonymous in Chemistry

Use the integral test to determine whether the series below converges or diverges. What values does the integral test yield?

1) Infinity(Sigma)n=0 (11)/((n^2)+49)
2) Infinity(Sigma)n=2 (1)/(n)(ln(n))^2
3) Infinity(Sigma)n=2 (3)/(4n-1)^2

Does the series converge or diverge?

2007-10-09 22:11:19 · 1 answers · asked by Victor 1 in Mathematics

first the question is.
If chocolate has 6% fat how do you work out how much there is in 0.5 of chcolate in gramms

one way of doing it is (0.5/100)x6=0.03

but how can 6% be calculated as 0.06

so you can do it as 0.06x0.5=0.03

2007-10-09 22:04:40 · 13 answers · asked by Anonymous in Mathematics

I got this letter to send one pair of socks to the name at the top of the list and then write the name of the person who sent it to me on the #1 spot and my name on the #2 spot . So I wasn't adding my name to the bottom of a long list like most chain letters... I talked to one of friends and she said it doesn't work, no matter what. I'm supposed to get 36 pairs of socks for the price of one... Why doesn't it work, if everyone participates?

see example:
http://members.tripod.com/oziahz/sock.htm

2007-10-09 22:03:54 · 5 answers · asked by Anonymous in Mathematics

an extremely horrible thing occurred yesterday. My girlfriend wanted to take her children at the zoo and i reluctantly agreed While visiting the tiger habitat, my girlfriend found the tiger to be very cute looking and beautiful. There was a thin fence, and i have no idea why but she inserted her hand to pat the tiger's head. Just as she rubbed her hand on the tiger's nose -- the next thing -- she has no hand! The tiger bit her on the hand with such tremendous force, that the entire hand got detached and he was literally walking away with her entire hand in its mouth and then to the horror of everyone, starts eating and chewing that bloodied hand. Showers of blood came out of her wrists and everyone screamed. Soon she fainted, and was taken to some hospital by zoo people. We are in a third word country, and the zoo officials say its my girlfriend's fault for touching tiger's face. But isn't it zoo's responsibility to tame and domesticate the tiger? gf is 28. shouldn't zoo pay 4 medical?

2007-10-09 21:55:12 · 7 answers · asked by Anonymous in Zoology

Magicians are teleporting object they keep in their bag to their hand or other places using mind power. How do they achieve this?

2007-10-09 21:44:21 · 11 answers · asked by softguy 2 in Parapsychology

(n!)^2/(kn)!

i know you use the ratio test but where do you go from there?

2007-10-09 21:29:41 · 2 answers · asked by Anonymous in Mathematics

My partner cuts up polystyrene (plastic foam) as a way of recycling materials for packaging. It's very efficient but the build up of static electricity slows the job down and drives her crazy.

She uses a wooden board and a steel knife with a bone handle, cuts the polystyrene into cubes about the size of a dice, and then puts them into a carboard box before going onto the next piece.

The static electricity build up causes the little cubes to cling to everything and sometimes to 'refuse' to go into the box!

As you can imagine, it slows the whole process down.

Any ideas about how to reduce the build up of static electricity?

Thanks!

2007-10-09 21:22:34 · 5 answers · asked by thing55000 6 in Other - Science

2007-10-09 21:16:38 · 3 answers · asked by Anonymous in Earth Sciences & Geology

2007-10-09 21:09:22 · 4 answers · asked by AwesomeAsker 1 in Earth Sciences & Geology

I have one living inside my head. Honest!!!

2007-10-09 21:07:24 · 14 answers · asked by Anonymous in Astronomy & Space

Thea notices that 4 = 2 + 2, 6 = 3 + 3, 8 = 5 + 3, and 28 = 23 + 5, so she thinks that it is likely that every even number can be written as the sum of two prime numbers.

is this Deductive or Inductive?

2007-10-09 20:43:31 · 3 answers · asked by bollionaire 2 in Mathematics

i cant figure it out it's killing me
i tried An = (n-1)(|n|-2)
nothing works :(

2007-10-09 20:41:00 · 2 answers · asked by robbyack2000 2 in Mathematics

form inside it?there would be no 4th dimension together. always there will be 3 dimenstion insde the black hole.

2007-10-09 20:37:34 · 8 answers · asked by J.ferdous_nsu 1 in Astronomy & Space

2007-10-09 20:36:49 · 10 answers · asked by sndofsilence83 1 in Biology

A 100µF capacitor is connected in turn to two different sinusoidal voltages of the same amplitude V=1.0V but different frequencies with f1 = 50Hz and f2 = 5kHz.

(i) Calculate the reactances X1 and X2.
(ii) By what factor is X1 greater then X2?
(iii) Calculate the amplitudes of the associated currents, I1 and I2.

2007-10-09 20:27:48 · 1 answers · asked by cruiserhj60 1 in Engineering

I hear there are lots of precious metals dissolved in sea water, including gold, silver, etc.

Is it possible to build a plant by the shore (say a nuclear one) which evaporates sea water and extracts all these metals?

2007-10-09 20:19:21 · 3 answers · asked by Capricorn 2 in Earth Sciences & Geology

the second question would be: who was the person and in what industry?

2007-10-09 20:07:25 · 3 answers · asked by c_r_a_z_y_f_r_o_g008 2 in Physics

ok i'm not dumb...but i thought it would be 4 because the negatives cancel out...so i tried it in my graphing calculator and it says it is -4 is that true???

2007-10-09 20:00:03 · 8 answers · asked by Anonymous in Mathematics