Science & Mathematics - 16 October 2007

a steer for 10 thalers, a calf for 2 thalers, a cow for 5 thalers, a sheep for 1/2 thaler.

2007-10-16 23:55:41 · 5 answers · asked by Anonymous in Mathematics

2007-10-16 23:33:39 · 36 answers · asked by Bubbles 2 in Geography

I've asked a similar question on Answers before, but it is still bothering me. Apparently we humans have a reptilian brain at the core, overlaid with a mammalian brain, on top of which is the neo cortex which is concerned with higher levels of thinking and consciousness. Assuming that we have these diverse elements in our brain as a result of evolution, how can a reptile evolve into a mammal? The reptile method of reproducing is by laying eggs which hatch outside the parent's body. Obviously as mammals we give birth to live young which we suckle. How can we evolve from one method of reproduction to the other by small incremental steps as the theory of evolution claims? Anything in between would not be viable as a way of creating the next generation, which would not survive and hence not breed. It offends my sense of logic, could someone please explain?

2007-10-16 23:08:56 · 12 answers · asked by whenyou'restrange... 3 in Biology

Does anyone know where i can get Phosphorus acid for fertilizer application?

I need it pure if possible.

Chem supply places somone could give me a link 2?

2007-10-16 23:08:29 · 2 answers · asked by Anonymous in Chemistry

2007-10-16 23:04:12 · 7 answers · asked by Anonymous in Weather

Obviously, if possible, a lunar stationary satelite over the "dark" side of the moon would be undetectable from earth. This could be useful for certain purposes.....

2007-10-16 23:01:07 · 10 answers · asked by chris_brompton 1 in Astronomy & Space

Please use the linear combination method or substitution method (would appreciate if linear combination i am having more troubles with that) to solve these problems i couldn't figure it out.. please and show a few steps of work i would greatly appreciate it. (Each comma seperates the 2 equations)

1) 2x-5y = 10 , -3x + 4y = -15

2007-10-16 22:56:10 · 3 answers · asked by Anonymous in Mathematics

2007-10-16 22:52:51 · 11 answers · asked by coolgal 3 in Paranormal Phenomena

Find the x-coordinate of all points on the curve y = sin 2x - 2 sin x at which the tangent line is horizontal. Consider the domain x = [0,2). (Enter your answer as a decimal.)

x = ____(smallest value)
x = ____
x = ____ (largest value)

2007-10-16 22:50:20 · 2 answers · asked by Rrrr0001 1 in Mathematics

A.T..I.N

2007-10-16 22:42:20 · 3 answers · asked by Anonymous in Physics

2007-10-16 22:40:16 · 31 answers · asked by Anonymous in Astronomy & Space

(a) How much work must one do (against gravity) to get a stone block (m=4000 KG) from the base of the pyramids to its place 30 m above that?

(b) How much Force (F) would a crane need to apply to lift the block into place (at a constant speed, so acceleration is very small)?

please show steps!!

2007-10-16 22:38:19 · 5 answers · asked by Anonymous in Physics

Maths problem.

2007-10-16 22:38:17 · 26 answers · asked by Anonymous in Mathematics

Well... stars and planets make up a galaxy... but then some scientists think that all the galaxies are just scattered around every where... how do we know that millions of galaxies, could make up one super galaxay? and then millions of those could form an even bigger galaxies... so yeah basically... how do we know that galaxies don't cluster together like stars and planets to make a bigger (MASSIVER) galaxy?

2007-10-16 22:33:15 · 3 answers · asked by awesomely_lame 3 in Astronomy & Space

2007-10-16 22:32:55 · 4 answers · asked by Anonymous in Astronomy & Space

2007-10-16 22:26:25 · 8 answers · asked by Zach-7 3 in Astronomy & Space

why dont the coffee beans just get pushed out of the way when the blade just begins to push on them?

Please explain

2007-10-16 22:25:26 · 4 answers · asked by Anonymous in Physics

2007-10-16 22:23:06 · 8 answers · asked by Anonymous in Astronomy & Space

If they pollute, what should we do with it?

2007-10-16 22:23:03 · 4 answers · asked by pascuachín 2 in Chemistry

I keep telling people that chances are that I will live forever and they think I'm crazy. Why do I think that I have a good chance of living forever? Well I'm 30 years old and by the time I'm 50 I believe that medicine and technology will be so advanced that by then there will be cures for many things. By 2030 there will be no such thing as death from disease...that's right.. no death from disease!!...That's how advanced we will be. By 2050 I predict that they will figure out a way to save our entire memory to a computer hard drive in case our body dies. Then as they perfect cloning techniques they will grow a new body in a lab and then implant that memory to the new body. Call me crazy, but I'm a futurist and I know I'm not the only one who is optimistic about the technological achievements that await us!

2007-10-16 21:51:40 · 18 answers · asked by Anonymous in Biology

2007-10-16 21:50:15 · 22 answers · asked by Tashamster 2 in Parapsychology

2007-10-16 21:40:46 · 5 answers · asked by Chelle 1 in Geography

Why not just use 240V? It seems simpler to have three evenly powered phases any of which can be paired with any other resulting in 240V power. Do certain applications require 208V? How do you know which type of service you have in your home?

I understand more or less HOW it is made (i.e. the high leg in the three-phase system - it just seems strange to have this odd leg - it seems like it would throw off the symetry of the 3-phase "braid."

also what would happen if the delta leg were paired witha regular 120 leg by accident?

2007-10-16 21:35:13 · 5 answers · asked by Anonymous in Engineering

time travel

2007-10-16 21:27:10 · 15 answers · asked by tahir f 1 in Astronomy & Space

i need 2 know some stuff about long sight eyes :
* ITs causes and treatment
*HOw this application of light works
*and Provide a written explanation of the scientific principles it demonstrated. ( e.g Automatic door sensors - " Light travels in stright lines" .)
.....

2007-10-16 21:26:28 · 4 answers · asked by ***Jaleh*** . 1 in Engineering

Hey can anyone tell me how 1+1 can = 1???

2007-10-16 21:16:58 · 14 answers · asked by crazy_foz51 2 in Mathematics

Is the only way to try the medicine out? How about if something really terrible happens?

2007-10-16 21:07:54 · 4 answers · asked by BMW M5 3 in Medicine

and when is the exact date to happen? plz give me the specific time to watch it in Indonesia?

2007-10-16 20:58:03 · 3 answers · asked by Tea Lover 3 in Astronomy & Space

If a car alternator (rotor) runs at 1500 rpm, how much watt will it produce? Does any one know? I don't need exact value.

2007-10-16 20:43:30 · 5 answers · asked by Mani 1 in Engineering

if any objects enter the earth and passing thru the atmosphere will be terbakar..then how about the soyuz then?is it going to burn also?tell me how was it like going back to earth

2007-10-16 20:39:00 · 4 answers · asked by little star 1 in Astronomy & Space