Science & Mathematics - 4 October 2006

2006-10-04 02:21:44 · 36 answers · asked by kondal f 1 in Astronomy & Space

A large water reservoir has two outlet pipes, a small one and a large one. It takes 7 hours to empty the reservoir when only the small outlet pipe is open. It takes 2 hours to empty the reservoir when only the large outlet pipe is open. About what fraction of the reservoir will be emptied in one hour if both the pipes are open?

2006-10-04 02:21:38 · 8 answers · asked by lak00018 1 in Mathematics

2006-10-04 02:20:41 · 16 answers · asked by Anonymous in Astronomy & Space

2006-10-04 02:19:48 · 9 answers · asked by praveen m 1 in Astronomy & Space

2006-10-04 02:19:31 · 9 answers · asked by Levi V 1 in Mathematics

2006-10-04 02:16:09 · 6 answers · asked by (-") (''-) 1 in Mathematics

I got infected with chickenpox and for some reason, I scratched like 5 or 10 on my face but there's like more than 10 holes in my face. I feel really embarrased at school talking to teachers and students and it's effecting my charisma skills.

Is there any way that I can get rid of this even if does take money?

2006-10-04 02:08:46 · 6 answers · asked by Samuel D 1 in Medicine

okay i just joined Last.Fm and it needs my timezone, i've tried heaps of times..and it keeps showing up with the wrong time. So which one do I pick...

2006-10-04 02:07:28 · 1 answers · asked by ? 6 in Other - Science

2006-10-04 02:06:51 · 28 answers · asked by Chris G 3 in Geography

it's due thursday, and i need to do quantitative observations (with numbers) it's like my only good idea, so i need help please!

2006-10-04 01:55:22 · 6 answers · asked by Bunny Slippers 2 in Other - Science

i really need help. cracked my brains over this for like 30 mins already.

t - 2e^(-0.5t) = 2

how do you solve for t?

2006-10-04 01:55:19 · 6 answers · asked by maczh2002 2 in Mathematics

Will it someday be possible to directly connect the human brain to machines (like computers)? If yes, when and how?

This question was asked at the Dropping Knowledge event on 9th September by Nicolas Flagey, 27, Cachan, France.

To find out more about Dropping Knowledge check out our blog:

Dropping Knowledge in the UK: http://uk.blog.360.yahoo.com/blog-qT1KKPQoRKdVT4lowpJCljbFokkuIzI8?p=1048

Dropping Knowledge in the US: http://blog.360.yahoo.com/blog-d8pH0dcoRKeB12yOcnUQp.9VCFos?p=12745

To discuss this subject in more detail follow this link to the official Dropping Knowledge website: http://www.droppingknowledge.org/bin/posts/focus/10876.page

2006-10-04 01:53:17 · 80 answers · asked by Anonymous in Other - Science

I just bought some chicken last night...it was not left sitting out. This morning I grabed a piece and noticed some egg like things....looked it up and its fly eggs.....I want to know if it was this way before I bought it....

2006-10-04 01:45:26 · 3 answers · asked by RLV 1 in Other - Science

2006-10-04 01:44:51 · 11 answers · asked by chyllyphylly 2 in Other - Science

2006-10-04 01:44:51 · 3 answers · asked by Anonymous in Physics

2006-10-04 01:41:45 · 4 answers · asked by Anonymous in Physics

after the 12 what are the compulsury training required to become an astronaut?please explain in details.

2006-10-04 01:40:46 · 3 answers · asked by cid 1 in Astronomy & Space

2006-10-04 01:40:15 · 1 answers · asked by Anonymous in Other - Science

2006-10-04 01:40:07 · 8 answers · asked by ? 6 in Earth Sciences & Geology

I am currently a high school math teacher, but I am quickly becoming sick of the laziness in a lot of today's youth. Even my Calculus students do not do their homework!! Because of this, I am considering a career change. I am lucky in that my degree is a bachelor of science in math with a teaching certificate. Does anyone have any suggestions for a career with this degree?

2006-10-04 01:37:53 · 10 answers · asked by houndgirl44 2 in Mathematics

Hi all, can someone help me understand the calculating of conditional probability? I know the formula, but let me pose this problem to you:

1) A bin has 10 bolts

2) 2 bolts are defective

3) Select 2 bolts one after the other without replacement

4) What are the conditional probabilities of both defective and nondefective bolts

What gets me on this problem is that the bolts will decrease with each one taken out of the bin, and its messing with my math. Any help will be awesome. Thanks!

~Sil

2006-10-04 01:35:43 · 3 answers · asked by Silden 1 in Mathematics

The sum of a positive number and its square is 56.Find the number.

2006-10-04 01:31:31 · 17 answers · asked by Choi T 1 in Mathematics

When I was at school our maths teacher showed us how they worked out the odds of winning the jackpot in the National Lottery. As this was about 10 years ago now I have a total mind blank of how it was calculated - can anyone out there help me out with a reminder maths lesson?

P.S. I am not a GCSE student who needs help with her coursework. Honest. I have a job. I just spend a lot of time on here.

2006-10-04 01:30:18 · 17 answers · asked by Little Bo Peep 3 in Mathematics

it for this project in chemistry. i cant find the price of carbon in the internet!!! help!!!!

2006-10-04 01:29:14 · 3 answers · asked by pweetyinpink05 2 in Chemistry

2006-10-04 01:24:21 · 4 answers · asked by sandra 2 in Physics

2006-10-04 01:21:29 · 4 answers · asked by katkat 1 in Botany

2006-10-04 01:14:57 · 2 answers · asked by vigor_bloodbath 1 in Physics

2006-10-04 01:13:28 · 8 answers · asked by Anonymous in Physics

in reference to distortion and compared with cameras that can
biological and physical science answers preferred

2006-10-04 01:11:36 · 17 answers · asked by Anonymous in Biology

if three pipes are opened together, how many hours will it take the three pipes to fill the tank? {hint: rate of pipe C is negative}

2006-10-04 01:09:17 · 7 answers · asked by Bangks 1 in Mathematics