Science & Mathematics - 21 August 2007

Population of African continent

2007-08-21 23:57:45 · 3 answers · asked by Anonymous in Geography

ok... say i hooked an electrical generator up to a motor so that the motor would spin the generator to make electricity... now say i made it so that the electricity output from the generator powered the motor and then this would just go on and on and on... is that perpetual motion?

if the power output wouldnt be enough to power the motor to make the machine go forever, then couldn't you just do that thing where you put a small gear next to a big gear, and then the small gear spins really fast?

have people done this before? i mean... if it works then why wouldn't we use this to power the world!!! like gosh!!! one for each house (or 10 whatever it takes..) i mean free power!!! (if it works)

2007-08-21 23:56:49 · 11 answers · asked by awesomely_lame 3 in Physics

I mean there are lots of aerospace companies that talk a lot of stuff but all they offer are sub orbital flights, Bigelow Aerospace is planning on building a space station hotel in orbit, but when can i expect to see luxury hotels on the Moon?

2007-08-21 23:54:14 · 8 answers · asked by Anonymous in Astronomy & Space

I notice that people tend to yawn when they see another people yawn. Is it some chemicle that spread when we yawn that trigged another to yawn?

2007-08-21 23:53:31 · 4 answers · asked by Ve 1 in Biology

many lives have been taken by the derailment what is the cause for that how to prevent it

2007-08-21 23:53:24 · 2 answers · asked by bharathi s 1 in Medicine

If so, can you please tell me!!!

2007-08-21 23:43:33 · 2 answers · asked by unek 1 in Astronomy & Space

Hi can someone tell me the following percentile scores please.

21 of 30= %?
16 of 30=%?
22 of 30=%?

thanks

2007-08-21 23:43:14 · 11 answers · asked by KB 3 in Mathematics

2007-08-21 23:37:16 · 6 answers · asked by Anonymous in Chemistry

In biology, why are all the words so similar, ie meiosis and mitosis?

didnt the retard that came up with these words not realise that some people are gonna have to learn them words? talk about taking inconsideration to whole new level!

huh!

2007-08-21 23:34:53 · 6 answers · asked by Anonymous in Biology

2007-08-21 23:34:01 · 7 answers · asked by aljo 1 in Physics

Helpful information would be greatly appriciated

2007-08-21 23:29:27 · 9 answers · asked by student 1 in Other - Alternative

2007-08-21 23:29:02 · 18 answers · asked by Anonymous in Weather

in our body

2007-08-21 23:24:22 · 16 answers · asked by abdul a 1 in Biology

which is mors efficient?

2007-08-21 23:22:53 · 3 answers · asked by mahesh s 1 in Engineering

C3H8(g) + 5O2(g) ----> 3CO2(g) + 4H2O(g)
TABLE
Compound standard enthalpy of formation (KJ/mole)
C3H8(g) -103.85
O2(g) 0
CO2(g) -393.51
H2O(g) -241.82

2007-08-21 23:22:40 · 2 answers · asked by lamide e 1 in Chemistry

2007-08-21 23:13:57 · 4 answers · asked by Anonymous in Weather

2007-08-21 23:13:30 · 3 answers · asked by Bubakar S 1 in Zoology

2007-08-21 22:54:06 · 8 answers · asked by Anonymous in Physics

Is there anything that you can add to water that when you freeze it the resulting ice will melt slower?

2007-08-21 22:36:05 · 8 answers · asked by ericbryce2 7 in Other - Science

2007-08-21 22:34:35 · 6 answers · asked by mythili 2 in Medicine

A farmer had a triangular plot measuring 15m, 20m, 25m.the sides of the triangle. He kept his three horses attached to three poles at the vertices of this plot by a rope 7 m. How much of the plot is ungrazed (grass not eaten)?
If you answer this question, you qualify for IIT. I request all IIT students not to answer, please.

2007-08-21 22:34:00 · 4 answers · asked by pereira a 3 in Mathematics

Why are penguins bottle-shaped??

2007-08-21 22:33:20 · 3 answers · asked by sdjfhdkjsfgkuae 2 in Zoology

Two planes travel from Manila to a southern city in the Philippines, the distance is 900km. Plane A has a ground speed of 90km/h faster than Plane B, and arrives 2 hours and 15 minutes earlier than Plane B. What is the ground speed of Plane A?

2007-08-21 22:30:02 · 2 answers · asked by John Sabre 1 in Mathematics

plz help

2007-08-21 22:28:04 · 3 answers · asked by tasnim 1 in Mathematics

If you wanted to boil a billy to make tea at the top of Mt Kosciuszko (228 metres above sea level) the water temperature when it boiled would be:...........??

2007-08-21 22:22:37 · 4 answers · asked by sdjfhdkjsfgkuae 2 in Earth Sciences & Geology

chromosme number? DOminant? Recessive? Sex linked?

2007-08-21 22:19:31 · 5 answers · asked by Anonymous in Biology

So magic has to be real. Come on how can nothing be made into something....how can thier even be nothing!!. I mean magic is makeing things appear out of no where.....I mean thinking about it...if the unverse wasnt real or w/e..what would take its place just blackness?? Thats something or a place...how was that blackness made. Who created it? How did magic make it happen though??? WHERE DID THE MAGIC COME FROM? And if the magic did come from somewhere then where did somewhere come FROM?


Ok so i am just rambling here but isnt it possible that there is some type of magic....or something idk, its really triipy to think about. Same thing with god...who made god, who made the person who made god, who made the person that made the person that made god, who made the person that made the person that supposedly made god? And so on and so fourth.....SCIENCE CAN AND NEVER WILL BE ABLE TOO EXPLAIN THIS!!!.


Also when the Big Bang happend...they tempeture was infinte? right?

Ty!!

2007-08-21 22:16:07 · 11 answers · asked by >=( 2 in Astronomy & Space

A five digit number is formed using digits 1,3,5,7 & 9 without repeating any are of these. What is the sum of all such possible numbers?

2007-08-21 22:13:00 · 4 answers · asked by Anonymous in Mathematics

2007-08-21 22:12:16 · 3 answers · asked by teokz2002 1 in Chemistry

If you could bring back ONE extinct species what would it be?

2007-08-21 22:09:32 · 4 answers · asked by primalterozi 3 in Zoology