Science & Mathematics - 24 September 2007

best anwer gets a star

2007-09-24 12:47:57 · 1 answers · asked by Mahjabeen H 2 in Mathematics

I know that the lifetime of a muon is about 2.2 microseconds. In terms of relativity, is that measured in the muon's reference frame, or the earth's reference frame? I'm doing a question about how a muon travelling at 0.99c from 10 km up in the atmosphere can make the 30 microsecond trip to the earth's surface within it's lifetime.

2007-09-24 12:47:13 · 2 answers · asked by jsprplc2006 4 in Physics

compound for molding items? I realise it wouldn't be as practical as polymers. But the basic idea behind steaming and bending wood for furniture is that they become more flexible when steamed. What would be suitable as a solvent for them? Would it require heat, pressure, what? And could the separated cellulose fibers be used for something else, like paper?

This is for some fiction I'm writing, but I'd rather have realistic details than making stuff up. I don't want to have people say "That's impossible! it can't work!"

Serious answers only, please. If the question isn't clear, say so, and I'll provide more details. Thanks!

25 SEPT 07, 0047 hrs, GMT

2007-09-24 12:44:57 · 1 answers · asked by cdf-rom 7 in Other - Science

2007-09-24 12:43:15 · 2 answers · asked by dweezyb 1 in Mathematics

2007-09-24 12:42:17 · 2 answers · asked by Terri L 2 in Biology

Somehow, the scientific community has failed to communicate the difference between Darwin's concept of 'origin of species' (which means how one-celled life forms self-propagated into all the different species we have on the planet today) and how/why life itself came to be, which evolution doesn't try to answer.

How can scientists communicate this to the religions, especially the fundamentalists? It's important, as religion still rules the world through the leaders of both the East and the West, and the LAST thing we need is another Dark Ages.

Any good opinions out there?

2007-09-24 12:41:39 · 4 answers · asked by nora22000 7 in Biology

If I have a single phase 200 Amp panel with phase "A" loaded at 24 amps and phase "B" loaded at 14 amps, would that make my total load at 120 Volts 36 amps? and then to convert that to 240 volts would I simply take the VA of 4320 VA @ 120V and divide by 240? That seems way too low. The problem is that all I have are the reading from the two legs of this panel, A & B... I need to know what the total load is with these two readings. These are radio panels so everything being powered is continuous, 80% rule mind you.


Thanks

2007-09-24 12:41:39 · 3 answers · asked by alex_blanding2001 1 in Engineering

Around hydrothermal vents on the ocean floor we expect to find ????? bacteria producing carbohydrates.

2007-09-24 12:40:45 · 1 answers · asked by Anonymous in Biology

race car driver makes pit stop and refuels, after refueling he leaves pit with acceleration whose magnitude is 6.0 m/second squared, and after 4.0 seconds he enters the main speedway. At the same instant, another race car that is on the speedway and traveling at a constant speed of 70.0 m/s overtakes and passes the entering car. If the entering car maintains its acceleration, how much time is required for it to catch the other car?

Ok so i setting it up as Vo=0 for driver 1, and a=6.0m/seconds squared. and t=4 seconds. Then for driver two i got a=0 since hes going at constant speed and V=70m/s. but which formula do i use?!

3. Suppose you are visiting a planet in a distant part of the galaxy. to determine the acceleration due to gravity on this planer, u drop a rock from height of 55m. The rock strikes the ground 1.9 seconds later. How many times greater is the acceleration due to gravity on this planet than that on earth?

55=1/2(a)(1.9)squared so 3 times greater?

2007-09-24 12:39:59 · 1 answers · asked by Anonymous in Physics

Are there any bees that can sting more than one time?
Why should it be that bees die after stinging- does it confer an advantage to the hive in some way?

2007-09-24 12:38:06 · 46 answers · asked by Buzzard 7 in Zoology

Alice's grandma has a birthdate which is a 5 digit palindrome in the form a-bc-de, month-day-year. If D is 1 more than e and c is 2 more than b, what is her birthdate?

2007-09-24 12:36:18 · 4 answers · asked by Jay J 2 in Mathematics

Cilia
Peroxisomes
Microtubules & Microfilaments
Plasma Membrane
Nuclear Envelope

And please dont insult me that i cant figure it all out, afterall, its homework help. Thx =]

2007-09-24 12:33:54 · 2 answers · asked by Anonymous in Biology

Why is body temperature 98.6 degrees farenheit

2007-09-24 12:28:15 · 5 answers · asked by Anonymous in Physics

lim x-->2 of "(x^2)+ x - 6/ x -2" = lim x --> 2 of "(x+3)"

I don't see how this is possibly correct

2007-09-24 12:23:19 · 2 answers · asked by Ar J 2 in Mathematics

2007-09-24 12:21:30 · 6 answers · asked by Anonymous in Mathematics

Consider any eleven integer numbers, not necessarily distinct. Prove that one can always choose six of these integers whose sum is divisible by five.

2007-09-24 12:19:26 · 2 answers · asked by mshb30 2 in Mathematics

2007-09-24 12:18:52 · 12 answers · asked by brianjosh2022 1 in Astronomy & Space

Is zero a negative number?

2007-09-24 12:17:58 · 10 answers · asked by Marshmallow 1 in Mathematics

2007-09-24 12:17:20 · 2 answers · asked by Anonymous in Other - Science

2007-09-24 12:16:49 · 3 answers · asked by Anonymous in Mathematics

help??
49, 400, 121, 225, 3600, and 576

2007-09-24 12:16:26 · 11 answers · asked by Jaylene C 2 in Mathematics

2007-09-24 12:13:43 · 1 answers · asked by Anonymous in Chemistry

2007-09-24 12:08:54 · 2 answers · asked by harold w 1 in Botany

2007-09-24 12:06:12 · 6 answers · asked by fpx 1 in Mathematics

2007-09-24 12:05:16 · 36 answers · asked by frogg135 5 in Astronomy & Space

what 2 numbers multiply to equal 0.25 and the sum of the 2 numbers is 1?

or

the sum of 2 numbers is 0.25 and the product of those 2 numbers is 1.

thanks! ten points to first correct answer!

2007-09-24 12:03:40 · 5 answers · asked by blahblah 3 in Mathematics

If you were standing in a bus moving at a constant velocity would you have to lean in a certain way to compensate for the bus's motion? What is teh bus were accelerating?

2007-09-24 12:01:31 · 3 answers · asked by Anonymous in Physics

I'm having difficulty understanding this concept. Please explain. Thanks.

2007-09-24 11:56:14 · 11 answers · asked by Anonymous in Astronomy & Space

a. multi-network
b. Norton
c. Thevenin
d. superposition

Can you also explain why plz thx.

2007-09-24 11:54:19 · 2 answers · asked by Arabian 1 in Engineering

basiaclly the quesiton is...the salor day is 4 mintues longer than the sedireal day...now along time ago...the earth had a day of 14 hours instead or 24...would the solar day still be 4 mintues longer or would the time get shorter

2007-09-24 11:49:07 · 5 answers · asked by up_riser 1 in Astronomy & Space