Science & Mathematics - 30 September 2006

I keep hearing about magnetars but I don't know what they are!

HELPHELPHELPHELPHELPHELP!

2006-09-30 18:57:37 · 4 answers · asked by Eddy G 2 in Astronomy & Space

2006-09-30 18:52:28 · 8 answers · asked by Anonymous in Biology

miguel tosses 10 coins per each turn in infinite turns. What is the probability that 10 heads will not appear in any 1 turn?

2006-09-30 18:50:49 · 5 answers · asked by kevin! 5 in Mathematics

2006-09-30 18:45:26 · 8 answers · asked by Skpin 1 in Chemistry

Why is oil added to petrol in two stroke engines.
Can this be adopted for 4 stroke engines
is it possible to provide an oil pan to 2-stroke engine to avoid mixing of oil with petrol

2006-09-30 18:43:14 · 6 answers · asked by meghanath l 1 in Engineering

2006-09-30 18:35:35 · 8 answers · asked by ? 4 in Astronomy & Space

2006-09-30 18:33:16 · 4 answers · asked by Anonymous in Mathematics

I know that they said one of the planets were not a planet any more. Wondering what new ones they have found! Can any one help me figure out how many planets there are and what the name of them are?

2006-09-30 18:25:55 · 11 answers · asked by hahnleticia 2 in Astronomy & Space

In the movie Bill&Ted's Excellent Adventure, they were able to instantly obtain a set of keys in a hidden location simply by reminding themselves to later go back in time to steal the keys and hide them in that location. Presto, the keys were there! If Yahoo Answers is still around in the next couple thousand years, would I be able to ask the future inventors of a time machine to come back to this very moment in time to visit me? Shouldn't they be here any second? Is this proof that Time travel will never be a reality or just proof that Yahoo Answers archives will be long gone and forgotten by then?

2006-09-30 18:25:35 · 9 answers · asked by Anonymous in Other - Science

and who determined this...and made it official ?

2006-09-30 18:25:11 · 9 answers · asked by omshantiom 1 in Astronomy & Space

the day we manage to travel faster than the speed of light, will we be able to follow a point of light reflected from the earth and see into the past?

2006-09-30 18:24:12 · 10 answers · asked by B D 1 in Physics

Anyone?

2006-09-30 18:23:36 · 12 answers · asked by Eve W 3 in Astronomy & Space

Ok so I have already worked these problems out but I'm just wondering what you guys get. Here are the problems:

Bill is in outer space on his way out of L.A. A force of 10 N pushes on Bill. Suddenly, when Bill has reached a speed of 250 mph, another 10 N force, directed opposite to the first force, also pushes on Bill. Now, with both forces acting on Bill, what happens to Bill's speed?

a) Bill will stop.
b) Bill will slow down.
c) Bill will speed up.
d) Bill will continue moving at a constant velocity.

Number 2:

Two blocks of masses 20 kg and 8 kg are connected together by a light string and rest on a frictionless level surface. Attached to the 8 kg mass is another light string which a person uses to pull both blocks horizontally. If the two-block system accelerates at 0.6 m/s^2, then what is the tension in the connecting string between the blocks?

a) 12 N
b) 6.0 N
c) 20 N
d) 4.0 N

Please provide why you feel the answer is right. Feel free to send me an IM. :)

2006-09-30 18:21:26 · 6 answers · asked by Anonymous in Physics

a - b
-----------------------
a2 + 2ab - 3b2

plus

a + b
---------------------
a2 - 2ab - 3b2

a2 means a squared, b2 means b squared

The answer in my textbooks says:

2a
------------------------
(a - 3b)(a + 3b)

I don't how one would get that
Could someone show me?
Please and thanks

2006-09-30 18:20:40 · 6 answers · asked by RobertStrong 2 in Mathematics

Can I find weather warnings for my area on the shortwave, or is it better just to get a NOAA emergency weather radio. Are there benefits of having a shortwave radio that I wont get with a plain NOAA emergency radio. What brand do you recomend

2006-09-30 18:17:37 · 4 answers · asked by RAW29 3 in Weather

How we calculate impedance of LCR circuit? is we igonre Xc & Xl cos they are same? how we draw phase diagram?

2006-09-30 18:12:53 · 6 answers · asked by Anonymous in Engineering

i am talking about the science . is there is possiblity to do.

2006-09-30 18:12:28 · 6 answers · asked by sweettheif_420 1 in Other - Science

The y-axis starts from -50 to 50. The fuction is 3125*(s^2+20s)/(s^3+150s^2+7500s+125000).I have already worked it out to this....0.5s*((50)^3/(s+50)^3)*((s+20)/20). Not sure how to find the coordinates using the slope of 20db/decade. I have a sheet that has bode plots for functions such as a/(s+a);(s+a)/s etc...

2006-09-30 18:08:22 · 1 answers · asked by DT 1 in Engineering

I believe in steady state theory.....how can anything have infinite density...If there is infinite density then may be it is possible to achieve infinite acceleration,to reach Speed of light...It i absurd according to me....I want to hear your arguement..!!!

2006-09-30 18:07:09 · 12 answers · asked by Anonymous in Physics

How do I find an nth order polynomial that goes through specified n points: (x,p(x))?

2006-09-30 18:06:46 · 3 answers · asked by modulo_function 7 in Mathematics

Is there a number "500 thousand million"

A friend asked my and I wasn't sure.

If it is a number, what does it look like?

2006-09-30 18:03:20 · 8 answers · asked by The Disciple 2 in Mathematics

2006-09-30 17:57:54 · 13 answers · asked by Pseudo Obscure 6 in Biology

If the above is true,

Then if your mosquito was killed next door where a person is murdered. Is it true that your DNA is at the scene? Since your blood is in the mosquito who sucked it from you...

2006-09-30 17:56:26 · 9 answers · asked by akanekaye 3 in Biology

I don't clearly understand it. Please help me.thank you

2006-09-30 17:52:42 · 7 answers · asked by xxx 1 in Biology

What does this represent intuitively?

http://en.wikipedia.org/wiki/Marginal_density

Thanks!

2006-09-30 17:52:41 · 2 answers · asked by craizdwei 2 in Mathematics

Biology

2006-09-30 17:47:56 · 2 answers · asked by Anonymous in Biology

2006-09-30 17:47:29 · 7 answers · asked by d-rizzle 2 in Medicine

2006-09-30 17:45:29 · 10 answers · asked by koko 1 in Other - Science

The cell membrane is made mostly of lipids. How can it allow cells to mantain a shield between aqueous enviroments both on the inner and outer of the cell?

2006-09-30 17:44:56 · 4 answers · asked by dundundun 1 in Chemistry

2006-09-30 17:43:06 · 7 answers · asked by Anonymous in Chemistry