Science & Mathematics - 29 January 2007

This is a 15 second clip from Youtube. It's a ufo in Japan from last August. If you pause it at just the right frame, you can see this is actually accelerating with some form of propulsion I've never seen before.
http://youtube.com/watch?v=mtQNfl2rxwc

2007-01-29 09:25:46 · 5 answers · asked by Anonymous in Astronomy & Space

what number decreased by 33and1/3% is 30?
show all work plz

2007-01-29 09:25:25 · 7 answers · asked by Anonymous in Mathematics

For any line with a slope of 4/5 a vertical change of 8 is always accompanied by how much of a horizontal change ?

2007-01-29 09:25:13 · 2 answers · asked by luciouzz_prmami 1 in Mathematics

In a Riverhead, NY, case, nine different crime victims listened to voice recordings of five different men. All nine victims identified the same voice as that of the criminal. If the voice identifications were made by random guesses, find the probability that all nine victimes would select the same person. Does this constitute reasonable doubt?

2007-01-29 09:24:29 · 1 answers · asked by Mario 1 in Other - Science

Why do we have black history month right after wasting a whole day on MLK day? Enough. Try to think about something besides being black.

2007-01-29 09:24:12 · 14 answers · asked by Anonymous in Biology

2007-01-29 09:23:57 · 5 answers · asked by sean.1996 1 in Botany

Why is it that when I spin my cup of hot chocolate round to get a blob of cream towards my mouth, the hot chocolate does not spin round with the cup? The cup spins but the liquid inside doesn't seem to move inside it. Why is this?

2007-01-29 09:23:18 · 6 answers · asked by dnbgrrly 2 in Physics

mary sold 105 tickets for the basketball game. each adult ticket costs 2.50$ and each student ticket costs 1.10$ mary collected $221.90. how many of each kind of ticket did she sell?

2007-01-29 09:22:42 · 6 answers · asked by jamaicangirl 1 in Mathematics

2007-01-29 09:21:00 · 3 answers · asked by xxSweeeeetheartttxx 1 in Mathematics

2007-01-29 09:18:50 · 11 answers · asked by Dark 1 in Earth Sciences & Geology

2007-01-29 09:17:41 · 7 answers · asked by xxSweeeeetheartttxx 1 in Mathematics

2007-01-29 09:16:44 · 2 answers · asked by behnam_casillas 1 in Geography

2007-01-29 09:14:30 · 4 answers · asked by xxSweeeeetheartttxx 1 in Mathematics

People talk about powering spacecraft with "anti-gravity" drives. But if they are traveling in empty space, where mass is minimal, wouldn't the drive malfunction? My understanding is that gravity only exists in the presence of massive objects, like the Earth, stars and planets. The "universal gravitation field" is incredibly weak. You can overcome it by flipping a penny into the air. So how could "anti-gravity" work as a space drive? Makes no sense to me.

2007-01-29 09:12:34 · 3 answers · asked by Anonymous in Physics

2007-01-29 09:11:31 · 2 answers · asked by Anonymous in Zoology

first of all how does P(4,3)=4*3*2=24? where does the two come from?

and how do you find the value of P(3,3), C(5,5), p(10,4) C(15,6), and P(4,2) these make no sence to me. This stuff is do tommaro and i think im doomed X.X

also im not sure how you can tell something is permutation or combination.

for example: 1. four musical instruments from a group of 12. how do i know which it is.

also how the hell do i do this

6!3!/4!2!

first one too help me actually understand this is who i consider smartest man or girl in the world .

2007-01-29 09:10:54 · 4 answers · asked by andrew 3 in Mathematics

2007-01-29 09:09:20 · 1 answers · asked by nauticaseven 1 in Mathematics

Was the world and it's creations created by random chance of no design? It's hard to believe that nothing created earth that has such intricate detail. Just the human body as one example is so complex. leaving religion aside, how did it happen? Is there a connection to our lack of awareness of the vast universe and beyond vs afterlife?

2007-01-29 09:09:03 · 3 answers · asked by trphuong 1 in Astronomy & Space

it does not seem to have enough power coming from it. Its a single phase 220v 20kva generator. That should give me about 80amps. Now I'm thinking that there are two outlets..... does this mean that the ampage is split between each ? 40amps each ?

2007-01-29 09:06:53 · 7 answers · asked by Anonymous in Engineering

- 3/5 * 7/5 * 7/9

2007-01-29 09:06:40 · 8 answers · asked by Lyndz 1 in Mathematics

Thanks for your extra bit o' incredible detail...Sincereley,Tom Science 4

2007-01-29 09:06:10 · 6 answers · asked by Anonymous in Physics

Im trying to find the z-score for each the following numbers in this sample set: 10, 20, 12, 17, 16.

I know that I have to find the sample mean and the sample standard deviation. The sample mean is easy but my book is not making sense to me about the steps to find the sample standard deviation to the z-score. Can anyone help walk me through this? Even if you show the entire problem it would help, I have more like it and i just need to SEE how its done?

2007-01-29 09:04:49 · 3 answers · asked by Christines256 3 in Mathematics

a) This is possible, but only from the equator.
b) This is possible, but only from the polar regions.
c) This is possible anywhere in Earth, but only at certain times of the year.
d) This is impossible.

I have no idea about this one. Any help would be greatly appreciated.

2007-01-29 09:02:09 · 2 answers · asked by Diggler AKA The Cab Driver 1 in Astronomy & Space

2007-01-29 09:00:27 · 7 answers · asked by roberta a 1 in Mathematics

Why are staphylococci well suited for colonization of skin?

This is for my microbiology lab on water activity and osmotic pressures affects on bacteria. I would think that it has to do with the amount of salt on human skin, but I don't know.

thanks!

2007-01-29 08:59:58 · 2 answers · asked by Anonymous in Biology

this is a 6th grade math question

2007-01-29 08:58:19 · 14 answers · asked by angeleyes3789 1 in Mathematics

i understand the conversion part of the question... the 13 ounces =.37 kg but i do not understand the question!!

2007-01-29 08:58:12 · 5 answers · asked by Linsee O 1 in Mathematics

this is a 6th grade math duestion

2007-01-29 08:54:00 · 5 answers · asked by angeleyes3789 1 in Mathematics

A 100-kg box is pushed across the floor a distance of 40m at a constant velocity. How much heat is developed?
A. 24.5J
B. 1020J
C. 4000J
D. 39,200J
Please help!!!

2007-01-29 08:53:34 · 6 answers · asked by zginder 3 in Physics

If the rate law for a reaction is rate = k[A][B] (both first order), and they both have a concentration of .02 M, the rate after 25% of B has reacted is what percent of the inital rate?

Could you explain how you got the answer? thanks (my main focus is trying to learn how to do it :) )

2007-01-29 08:53:26 · 3 answers · asked by Anonymous in Chemistry