Science & Mathematics - 17 August 2007

2007-08-17 23:49:49 · 9 answers · asked by viviam i 1 in Earth Sciences & Geology

i read an article BY CIARA CURTIN .. title: NASA Spent Millions on a Pen in section (fact or fiction)

WHAT THE HELL?! IT SO STUPID! THE RUSSIANS USED A PENCIL THAT COST $1 OR LESS (I DON'T know the pencil price in russia!)

2007-08-17 23:49:25 · 10 answers · asked by TRUE-NERDY-BOY 1 in Astronomy & Space

I think it's somewhere under the ornithology section.

When a bird hatchling hatches out, they identify the first living thing they see as their mother. Some cases like chickens and ducks happen to have this trait, and that is the factor they often follow their mother around. I also saw some videos previously, where there are ducks and hens mistakenly identify the barn caretaker as their mother as soon as they hatched, and often follow the barn caretaker almost everywhere, except being locked at the coop.

I remember it somehow started with the word "photo- ?" but forgot the remaining last pronunciation for this. Can anyone help me on this term definition and the name of it? Thank you.

(Please do not answer that you do not know if you really don't know about it.)

2007-08-17 23:41:03 · 4 answers · asked by Bethel 2 in Zoology

2007-08-17 23:34:19 · 13 answers · asked by Mc Durst 2 in Physics

2007-08-17 23:33:18 · 4 answers · asked by what is 60ft in meters? 1 in Mathematics

with respective probabilities of .4, .3, .2, and .05. In addition, there is a 3 percent chance of breaking even and a small chance of losing $10,000. Find the expected profit.

2007-08-17 23:25:34 · 2 answers · asked by Anonymous in Mathematics

2007-08-17 23:23:45 · 9 answers · asked by Silver Fox 2 in Zoology

A species that could be able to form a civilization...

PS: There are zillions of creatures that can't think... In the theory of the evolution of human why couldn't any other species like evolve like us side by side after a breaking point?

2007-08-17 23:18:26 · 7 answers · asked by Anonymous in Biology

Supposedly, nothing can exist without a relative opposite spectrum... SO if noone were to answer this questionwould it have been asked...and better yet...would I exist?!? lol?

2007-08-17 23:04:23 · 20 answers · asked by Anonymous in Astronomy & Space

2007-08-17 22:56:01 · 5 answers · asked by LG 1 in Mathematics

40 blue, 40 red, 20 green. 60 of these are large. What's the probability of choosing 3 large, blue, without replacement?

I can do this if there aren't large and small. If they are all the same size, the answer is 6.1% chance for 3 blue.

How do you factor in the 60 large?

Thanks!

2007-08-17 22:51:11 · 1 answers · asked by powhound 7 in Mathematics

i have heard about some gold mines using bacteria to extract gold from ore. how does it work? and where can i get those bacteria?

2007-08-17 22:51:06 · 3 answers · asked by Anonymous in Earth Sciences & Geology

2007-08-17 22:46:39 · 9 answers · asked by ravi 2 in Physics

I know that:

(a-b)(a-b)=a^2-2ab+b^2

For example, by substituting a=3 and b=1:


(3-1)(3-1)=4

or

3^2-2*3*1+1^2=9-6+1=4

I know they are equal but...

What I want to ask is that in the first place, how do people know we need to use the 3 in the first bracket to multiply the 3 in the second bracket and then use the 3 in the first bracket again to multiply the -1 in the second bracket and so on.

Thank you.

2007-08-17 22:39:46 · 7 answers · asked by I need answers 1 in Mathematics

I don't really want a job in a zoo or like a vet or a pet store. Zoologist or marine biologist would be really awesome but they don't pay much and they are not very much hands on work just mostly watching the animals. What could i do?

2007-08-17 22:39:36 · 10 answers · asked by Anonymous in Zoology

2007-08-17 22:38:43 · 3 answers · asked by Anonymous in Chemistry

http://youtube.com/watch?v=ZYzM1M1X790&mode=related&search=

2007-08-17 22:30:18 · 2 answers · asked by Mercury 2010 7 in Astronomy & Space

A small vehicle of mass 640 kg is powered by a battery-driven electric motor. The total frictional resistance to motion is 200 N. The car moves up incline at a steady speed of 2.0 m/s.

(There is a diagram provided whereby a right angle triangle is drawn. And the vertical height is 10 m and the hypotenuse is 160 m.)

Calculate

(a) The total work done in bringing the car to the top.

(b) The power the motor must develop to propel the car up the incline.

2007-08-17 22:29:54 · 1 answers · asked by whatagowk 2 in Physics

What is the exact Quadratic Formula? I really need to have the exact answer...I need to have my perfect answer...in my ASSIGNMENT........

2007-08-17 22:14:33 · 7 answers · asked by Anonymous in Mathematics

2007-08-17 22:13:32 · 12 answers · asked by BunsOfSteel 2 in Engineering

2007-08-17 22:03:53 · 5 answers · asked by Anonymous in Earth Sciences & Geology

when it rains, worms often crawl out of the dirt/lawns and end up on the concrete, where if left, they dry up and die! so if we throw them back onto the lawn where they left from...are we actually saving them?

2007-08-17 21:58:47 · 2 answers · asked by bulletww 1 in Zoology

2007-08-17 21:58:36 · 11 answers · asked by Anonymous in Astronomy & Space

or can you even see them? If so, can you tell the difference without a telescope?

2007-08-17 21:55:27 · 12 answers · asked by zail 3 in Other - Science

2007-08-17 21:54:17 · 16 answers · asked by aslam j 1 in Geography

>mossy zinc+copper(II) sulfate solution
>mossy zinc+copper(II) sulfate solution+6N HCl

please help

2007-08-17 21:47:56 · 4 answers · asked by Anonymous in Chemistry

what acids involved hydrogen when acted upon by metals?

and why?

2007-08-17 21:33:19 · 2 answers · asked by Anonymous in Chemistry

It appears that Pluto is not a planet. So, if our school students are asked how many planets there are, how should they respond and be correct?

2007-08-17 21:23:55 · 10 answers · asked by Boomer 5 in Astronomy & Space

it would be better if it is about electromagnetic waves or about optics

2007-08-17 21:12:58 · 4 answers · asked by Anonymous in Physics

related answer

2007-08-17 21:06:43 · 11 answers · asked by indu m 1 in Astronomy & Space