Science & Mathematics - 25 September 2007

2007-09-25 06:55:13 · 3 answers · asked by smac1 2 in Other - Science

2007-09-25 06:53:41 · 4 answers · asked by Anonymous in Biology

A hole is drilled through the center of Earth and elevator car is installed inside?
The car departs from the surface (1km above sea level), and after quick initial acceleration continues to move towards the center of the earth at constant velocity 100 m/s.

Few seconds into constant velocity phase of the trip, when elevator just crosses sea level, a passneger drops elactic ball on the floor, which continues to bounce elastically from the floor with initial period 1s.

As the car approaches the center of the earth, period of bouncing gradually increases.

What is the period of bouncing half-way towards the center of earth?
[in assumption of uniformly dense planet, gravity at this point is g/2]

2007-09-25 06:53:04 · 4 answers · asked by Alexander 6 in Physics

i saw a tv show the other day about this woman who had a robot copy of herself made, but when she finds out, she says that's impossible because it violates quantum mechanics, i thought that quantum mechanics dealt with extremely small particles! can someone explain this to me?

2007-09-25 06:51:04 · 8 answers · asked by Loki 1 in Physics

Please answer as if you were talking to a layperson (which you are). I'd like your answer to be understandable by anybody with a VERY basic understanding of physics.

2007-09-25 06:50:33 · 3 answers · asked by Anonymous in Physics

2007-09-25 06:50:08 · 2 answers · asked by FirRa 1 in Mathematics

http://www.usoc.org/omega-lowres.jpg

2007-09-25 06:48:36 · 4 answers · asked by Anonymous in Physics

2007-09-25 06:46:58 · 3 answers · asked by princes3242000 1 in Engineering

There is a squirrel. He buries acorns 9 inches apart along a 3-foot long line, then turns 90° and buries acorns in a straight line for another 3 feet, and continues in this manner until he has completed a perfect square. Each side of the square is three feet long. how many acorns Square Sam buries to complete his square? please help asap!!!

2007-09-25 06:44:05 · 7 answers · asked by *Ch@R* 2 in Mathematics

2007-09-25 06:42:21 · 8 answers · asked by okrusoup 2 in Physics

2007-09-25 06:39:13 · 4 answers · asked by ToDdMiEsTeR 1 in Mathematics

1H & 1H+
19F & 19F-
7LI & 23Na
7Li &9Be
12C&13C


PLease explain how you came up with this so i can learn. thank you

2007-09-25 06:33:28 · 4 answers · asked by ccutestuff2001 2 in Chemistry

2007-09-25 06:31:07 · 8 answers · asked by Anonymous in Mathematics

what cause the sun to set and what cause rise

2007-09-25 06:29:02 · 11 answers · asked by blaze w 1 in Astronomy & Space

2007-09-25 06:24:47 · 1 answers · asked by Anonymous in Engineering

It is good they are trying to privatize the space industry, but can you actually built a robot for 20 millions dollars? to go to the moon

Anything else that you might think

2007-09-25 06:20:04 · 6 answers · asked by Anonymous in Astronomy & Space

Using truth tables to determine which expressions in each of the groups are equal:


F= ac' + a'c + bc
G= (a+c)(a'+b+c')


can someone show me how to do this problem please! Thanks so much

2007-09-25 06:19:44 · 1 answers · asked by chs_soccer_02 2 in Engineering

pls help.

2007-09-25 06:19:42 · 6 answers · asked by oge 4 in Physics

please help me!!
this is for my science project which is due tmrw !! :(

2007-09-25 06:19:25 · 3 answers · asked by oreaoranges 2 in Chemistry

...especially when wet!

2007-09-25 06:17:29 · 4 answers · asked by Anonymous in Earth Sciences & Geology

int (-infinity, 0) 1dx/(2x-5)

2007-09-25 06:16:21 · 3 answers · asked by sugardaddy8815 1 in Mathematics

2007-09-25 06:15:59 · 36 answers · asked by lien 1 in Geography

2007-09-25 06:15:55 · 1 answers · asked by Caramel 2 in Chemistry

2007-09-25 06:15:43 · 19 answers · asked by Anonymous in Zoology

The Inuit and the Aleut adapted to their environment by using?


dried buffalo dung to fuel their fires.
abundant evergreen trees to build large dugout canoes.
blocks of ice to build igloos for housing.
logs and bark to build rectangular dwellings called longhouses.

2007-09-25 06:14:25 · 2 answers · asked by V.S. 2 in Earth Sciences & Geology

1. C + O2 ---> CO
2. Al + S8---> Al2 S3
3. K + B2 O5---> K2 O + B

2007-09-25 06:12:49 · 2 answers · asked by Anonymous in Chemistry

2007-09-25 06:10:16 · 2 answers · asked by Anonymous in Chemistry

Could you help?

2007-09-25 06:06:50 · 1 answers · asked by Caramel 2 in Chemistry

If we order a large pizza (16" diameter) and slice it into 12 slices, what is the area of one piece?

2007-09-25 06:06:04 · 6 answers · asked by Nicky 2 in Mathematics

F2
N2
NO+
CO
O2

Please explain to me why the answer is what it is

thanks

2007-09-25 06:05:55 · 1 answers · asked by ccutestuff2001 2 in Chemistry