Science & Mathematics - 10 December 2007

...from the earth's cooling off, after it was formed, 4.6 Billion years ago?

2007-12-10 13:34:06 · 21 answers · asked by Anonymous in Earth Sciences & Geology

I need to understand what nanotechnology is and how it is used but im only 13 so please make it easy for me to understand.

2007-12-10 13:33:52 · 2 answers · asked by c0l0mbianchika11 1 in Engineering

I was wondering if brain waves were like sound waves. If so could someone record there voice for like a door lock then put on a brain wave amplifier and be able to unlock the door with his/her mind by just saying what the recorded words. Because I would like to try it but do not have the funds. What do you answerers think?

2007-12-10 13:29:47 · 7 answers · asked by encikus 2 in Physics

Whats wrong here

AAA
BBB
CCC
DDD
EEE
FFF
GGG
HHH
III
JJJ
KKK
LLL
MMM
NNN
OOO
PPP
QQQ
RRR
SSS
TTT
UUU
VVV
WWW
XXX
YYY
ZZZ

what is wrong here... personally i have no idea, but does anyone else know

2007-12-10 13:26:52 · 6 answers · asked by Anonymous in Geography

I have to do a project on one poisonous plant that is native to and widespread in New England for my Field and Forage Crops class.I've been looking online and I found a great resource in a big list on Cornell's website,except it doesn't say where the plant is found.The plant has to be poisonous to livestock and/or horses,doesn't matter if it is to people.Anyone have any suggestions,or know where I can find this information?I was thinking foxglove,or milkweed,but I don't know where they are from,so it doesn't really help me,haha.

2007-12-10 13:26:26 · 7 answers · asked by Lindsey 3 in Agriculture

steel beams to light weight steel beams..for reinforcement

2007-12-10 13:23:47 · 3 answers · asked by joe 1 in Engineering

A chemist claims to have found a complex ion where the most intensely absorbed light is 342.0 nm. Estimate the crystal field splitting energy for this ion in kJ/mol

2007-12-10 13:22:49 · 3 answers · asked by jeniferrrr 1 in Chemistry

Here the question that I'm struggling with but I'm having trouble with problem C.

One employee of a furniture store is paid a base salary of $ 4000 a month plus an 6 % commision on all sales over $ 8000 during the month.

(A) How much must the employee sell in one month to earn a total of $ 9000 for the month?
$ 91333.33

A second employee of the furniture store is paid a base salary of $ 5000 a month plus 3 % commission on all sales during the month.

(B) How much must the employee sell in one month to earn a total of $ 9000 for the month?
$ 133333

(C) Determine the sales level at which both employees receive the same monthly income.
$ ???

2007-12-10 13:18:10 · 2 answers · asked by MUSICQUEEN88 1 in Mathematics

Boreal forests are made up of what leafed trees?

Mixed forests are made up of something and something trees?

Deciduous forests are made up of what trees?


Tropical forests are made up of what?

2007-12-10 13:17:22 · 2 answers · asked by Anonymous in Botany

(a) the next 100-year flood will occur in exactly 100 years.

(b) the next 100-year flood will occur in exactly 99 years.

(c) you could be flooded by the 100 year flood again this year.

(d) you can expect a 50 year flood in exactly 24 years.

2007-12-10 13:16:45 · 12 answers · asked by Aditya G 1 in Earth Sciences & Geology

Consider a food chain in which a grasshopper eats grass, the grasshopper is eaten by a frog, and the frog is eaten by a snake. Given these relationships, which of the following is not correctly matched?
(a) grass -- autotroph

(b) grasshopper -- herbivore

(c) frog -- secondary consumer

(d) snake -- primary consumer

2007-12-10 13:16:18 · 2 answers · asked by Aditya G 1 in Earth Sciences & Geology

a)6,0 b)4,-2 c)-8,6 D)0,6

2007-12-10 13:14:49 · 2 answers · asked by Anonymous in Mathematics

Hexodecimal is base 16.

2007-12-10 13:14:16 · 5 answers · asked by Akito L 1 in Mathematics

2007-12-10 13:14:05 · 5 answers · asked by Kevin Lam 1 in Chemistry

in cloudy weather when you cant see the sun, how du find out which direction is north, east, and so on? i just moved to a new city. every time i get off the subway in downtown, i lose direction all the time. i have no sense of direction. i have to ask people like everyday. how du figure the direction quickly without keep bothering people?

2007-12-10 13:10:49 · 3 answers · asked by Bun 4 in Geography

ive looked around in my science textbook and it doesnt say anything about that. it's for a poster.
heeeelp!
---Cheri

2007-12-10 13:09:32 · 1 answers · asked by Samantha 3 in Biology

problem is

3(y-7) to power of 2 = -12

2007-12-10 13:08:20 · 8 answers · asked by jin l 2 in Mathematics

Please explain

2007-12-10 13:07:03 · 12 answers · asked by Anonymous in Paranormal Phenomena

it was not a flare or meteor . it had a distinctive tailas other comets i have witnessed before . but this one only lasted about 30 min. it was straight overhead and the tail shifted from west to north then faded slowly away dont know what else it could be but deffinatly not meteot or flair

2007-12-10 13:06:40 · 11 answers · asked by taylor2459 2 in Astronomy & Space

2007-12-10 13:05:37 · 3 answers · asked by Anonymous in Mathematics

A)dilation B)R(0,90)degrees c)ry=x D)T(3,6)

2007-12-10 13:04:32 · 1 answers · asked by Anonymous in Mathematics

Aliens from another planet have landed in your neighborhood and have asked you to show them around your town for one day in order to learn about life on Earth. Where do you take them and what do you do?

2007-12-10 13:04:06 · 21 answers · asked by shimmer 1 in Astronomy & Space

2007-12-10 13:02:54 · 11 answers · asked by laura v 1 in Chemistry

My daughter wants to know the answer for homework and I have no idea because I never learned it!

2007-12-10 13:01:00 · 13 answers · asked by iluvmyhorsemorethenanything1204 1 in Mathematics

2007-12-10 12:59:17 · 3 answers · asked by Poonani 1 in Physics

we are supposed to write a blog comment online for our school on whether or not we think it is write to have elected surgery. i dont know what that is. and also what is gastric bypass sugery and lasik surgery. thanks so much everyone!

2007-12-10 12:59:11 · 3 answers · asked by Anonymous in Medicine

Use the data of Table 7.3 to find the point between Pluto and the Sun at which an object can be placed so that the net gravitational force exerted by Pluto and the Sun on this object is zero. Answer is m from center of Pluto.
Data from table:
Pluto's radius = 1.5e6
Pluto's distance from the sun = 5.91e12
Sun's radius = 6.96e8

Info from notes:
G = 6.67e11
F=G(m1m2/r^2)

I'm assuming you use this equation and set the two sides equal, but I can't get it to work. Thanks in advance!

2007-12-10 12:58:39 · 1 answers · asked by Anonymous in Physics

The atmospheric pressure p on a balloon or an aircraft decreases with increasing height. This pressure, measured in millimeters of mercury, is related to the height h (in kilometers) above the sea level by the formula... p=760e^(-.145h)


Question. Find the height of a mountain if the atmospheric pressure is 664 millimeters of mercury.

2007-12-10 12:57:51 · 4 answers · asked by Dave & Sunny 2 in Mathematics

I don't get it.

2007-12-10 12:57:22 · 4 answers · asked by hohum 1 in Mathematics

and thought it was just so beautiful that you forget about your problems, and everything else just dissapears?

2007-12-10 12:56:04 · 8 answers · asked by Sydney 4 in Astronomy & Space