Science & Mathematics - 4 February 2007

The current theory of the universe is an endless cycle of Big Bang to Big Crunch to Big Bang to Big Crunch to Big... If this is true and considering the current physics law where
1. The total amount of energy is the same,
2. Energy can't be created nor destroyed,
3. Action will be met by reaction,
then what exactly cause the whole universe to endless evolution? It seems like the universe itself is a perpetual self-sustaining form of existence. Some sort of perpetual motion.

If we swing a pendulum in space, it will eventually stop due to gravitation but why the universe can't stop? If there's nothing outside the universe, then the universe itself must be a form of self-sustaining perpetual motion existence, making physics law void.

What's your comment?

2007-02-04 19:56:18 · 6 answers · asked by Anonymous in Astronomy & Space

They ask me: How long will it take LIGHT (or radio waves travelling at the speed of light) to get to Sirius. (Give your answer in years)

2007-02-04 19:52:32 · 3 answers · asked by Anonymous in Physics

2007-02-04 19:50:42 · 6 answers · asked by S M 5 1 in Engineering

2007-02-04 19:50:39 · 2 answers · asked by kather f 1 in Medicine

2007-02-04 19:48:44 · 11 answers · asked by anamika 1 in Astronomy & Space

This is in Introductory Calculus Year/grade 11.
The intersection of two lines.

Question: find the intersection of each pair of lines. Remember to write it in the form of y=mx+c first

1) x+4y=5 and x-2y=-1

note: I was able to put them into the form y=mx+c but I ended up with on the 1st equation: 4y=-x-5. Do I have to get the y by itself for it to be in the form y=mx+c? If so do I just divide both sides by 4 and have the two on the right hand side of the equals side as fractions? Won't that make finding the point of intersection quite difficult when I do the next equation to find x and then y? I really am not sure what to do. Please help me and please explain it to me also if possible.

Please tell me if you're not entirely sure of how to do this. If this helps, the final answer for the point of intersection (where the two lines meet together) is:

x=1, y=1 Point of intersection: (1,1).

2007-02-04 19:41:48 · 13 answers · asked by Anonymous in Mathematics

http://en.wikipedia.org/wiki/L%C3%A9on_Theremin#Espionage Wikipedia talks about it being real simple, but would an electrete mic work? would i quite litteraly attach 1/4 wavelength size wires on each side of the mic? I understand the concept just not the detals. Anybody have/willing to draw a schematic for me?

2007-02-04 19:39:28 · 2 answers · asked by cwazybwo 1 in Engineering

Is there a risk if they have digital displays/controls?

2007-02-04 19:36:38 · 3 answers · asked by Jay in Saudi 1 in Engineering

Is it possible to freeze people and recovering them to a living state once they have been frozen?

2007-02-04 19:36:05 · 6 answers · asked by karen y 1 in Biology

at the time of any cell division we say that the two or more daughter cells take birth but we never say two male cell teke birth why?

2007-02-04 19:29:49 · 4 answers · asked by dimple 1 in Biology

2007-02-04 19:20:57 · 13 answers · asked by blisskissbabe 2 in Mathematics

is nerve cell a complete cell?

2007-02-04 19:17:22 · 2 answers · asked by nostaglia 1 in Zoology

2007-02-04 19:17:02 · 6 answers · asked by huoshenfeng124 1 in Zoology

a very dear relative is concidering this and i have no answer, he is in pain, slow moving every morning, does not have any other avenues to help him gain energy or "kickstart" and cannot obtain the expensive doctor visits and believes that his initial availuability of the drug could "start him up" help because he realizes he is overwieght, age 50 plus, devorced,and knowingly will recieve meanful suggestions or opinions , so please only people who are'nt mean or assholes reply! thankyou

2007-02-04 19:16:10 · 1 answers · asked by fishsticks 1 in Medicine

A company's cost in pesos of producing x units of a certain product is given by C(X) = 800 + 0.4x + 0.0002x^2 [<

2007-02-04 19:08:31 · 4 answers · asked by Anonymous in Mathematics

how is it measured?
in amps, watts, volts, coulombs, watt-hours, moles, faradays, joules? i just don't get it. how are all of these different? why would you use one over the other?

2007-02-04 19:06:21 · 5 answers · asked by smokesha 3 in Physics

This is if x>0
It can also be expressed as x=log y/log x,which also =xth root of y
I think its unsolvable maybe someone can figure it out

2007-02-04 19:05:22 · 11 answers · asked by Funkmasta 3 in Mathematics

x+a/x-a - (x+a)(x+a)/a(x-a)

x+a and (x+a)(x+a) are two numerators.

2007-02-04 19:05:17 · 4 answers · asked by lirael1019 1 in Mathematics

a.pluto
b.earth

2007-02-04 19:01:59 · 19 answers · asked by sai 1 in Astronomy & Space

2007-02-04 18:55:38 · 11 answers · asked by neharikamadsci 1 in Astronomy & Space

Do we know everything there is to know about fire? Or are there some unanswered questions we (as human civilization) still don't have answered? If so, what are they?

2007-02-04 18:52:16 · 3 answers · asked by Bill 2 in Astronomy & Space

2007-02-04 18:51:25 · 1 answers · asked by jp 1 in Earth Sciences & Geology

As the bible says, we are created in the image of god, and god is almighty. So what would happen to faith if/when we discover (or most likely are discovered By) beings of a higher intellingence and stature than us humans of god? Would that make us inferior?, thus making God inferior?

2007-02-04 18:51:22 · 6 answers · asked by Knowledge All Nite 1 in Astronomy & Space

an athlete completes 1 round of a circular track of diameter 200m in 40s.what will be the distance covered and the displacement at the end of 2minutes 20 secs?

2007-02-04 18:50:56 · 3 answers · asked by pooh 3 in Physics

2007-02-04 18:48:33 · 1 answers · asked by Jane M 1 in Engineering

I just want to know what factors determine the loudness of the speaker in a radio circuit, how to compute and find out their values .Thanks

2007-02-04 18:44:37 · 5 answers · asked by sain 1 in Physics

Tensile strength of ingots. A study was conducted to examine the relationship between the cost structure and mechanical properties of equiaxed gains in unidirectionally solidified ingots (metlurgical transactions , May 1986) Ingots compose of copper alloy poured into one of the three mold types (Columnr,mixed, or equiaxed)with either a transverse or a longitudinal orientation,From each ingot,five tensile specimens were obtained at varying distances(10,35,60,85 and 100 milimeters)from the ingot chill face and yield strength was determined..

a)How many strength measurement will be obtained if the experiment includes one ingotfor each mold type-oreintation combination?
b) Suppose three of the ingots will be selected for further testing at the 100 mm distance, How many samples of three ingots will can be selected from the total number of in the experiment?

2007-02-04 18:42:24 · 1 answers · asked by Bob 1 in Physics

2007-02-04 18:38:30 · 3 answers · asked by Jane M 1 in Engineering

2007-02-04 18:38:21 · 1 answers · asked by Sanket N 1 in Medicine

2007-02-04 18:38:15 · 10 answers · asked by tuf gal 2 in Astronomy & Space