Science & Mathematics - 9 December 2007

2007-12-09 21:50:31 · 2 answers · asked by Anonymous in Mathematics

2007-12-09 21:40:59 · 13 answers · asked by Christopher 2 in Mathematics

2007-12-09 21:37:55 · 6 answers · asked by Butch S 1 in Astronomy & Space

2007-12-09 21:34:19 · 17 answers · asked by Anonymous in Mathematics

I *need* to figure this baby out, and I'm not having much luck...can you guys walk me through it in as much detail as you can muster? I can really, really use it! Here it is:

"A plane is capable of flying at a speed of 180 km/hr in still air. The pilot takes off from an airfield and heads due north according to the plane's compass. After 30 minutes of flight time, the pilot notices that, due to the wind, the plane has actually traveled 80km at an angle 5 degrees east of north.
a) What is the wind velocity?
b) In what direction should the pilot have headed to reach the intended destination?"

2007-12-09 21:22:55 · 4 answers · asked by netsurfer733 2 in Mathematics

Without actually taking a photo...

2007-12-09 21:11:18 · 18 answers · asked by mima... 4 in Paranormal Phenomena

2007-12-09 21:07:18 · 4 answers · asked by tobi 1 in Mathematics

2007-12-09 20:58:22 · 1 answers · asked by Anonymous in Chemistry

Are there any states located south of 25 degrees N latitude? If so, which one(s)?

What is the only country on the Iberian Peninsula that borders the Mediterranean Sea?

What is the name of the bay that is connected to the Atlantic Ocean by the Hudson Strait?

What is the body of water that separates Iran from Saudi Arabia?

If you were designing a map, would you like 1 inch to equal 1 mile, 100 miles, or 500 miles? why?

What line of latitude falls halfway between the Tropics of Capricorn and Cancer?

Which of the following states is farthest North: Nebraska, Iowa,South dakota,Michigan? What is the capital city of that state?

2007-12-09 20:54:51 · 6 answers · asked by thirt33n 3 in Geography

2007-12-09 20:32:23 · 8 answers · asked by the_roc321 1 in Astronomy & Space

noon rpt at sea
04.12.07/(1200lt)/pstn:1347n/04226.2e/brob:ifo:743.6mt/mgo:83.8mt
avrg.speed:11.5knots/daily distnc:272.5nm(se'ly strong wind/heavy
sea/counter current)

I cant understand all these terms. Can u explain them in full english names. Thanks.

2007-12-09 20:20:47 · 4 answers · asked by cutie 2 in Weather

There is this saying, it's something like "Lack of evidence, is not evidence of nothing there." Something in the same genre. It's not those exact words, but its what it means.. WHAT IS THAT SAYING???? Easy 10 point.. hey?

2007-12-09 20:16:02 · 6 answers · asked by Anonymous in Astronomy & Space

There is this saying, it's something like "Lack of evidence, is not evidence of nothing there." Something in the same genre. It's not those exact words, but its what it means.. WHAT IS THAT SAYING???? Easy 10 point.. hey?

2007-12-09 20:13:22 · 3 answers · asked by Anonymous in Astronomy & Space

2007-12-09 20:09:43 · 2 answers · asked by Trice 1 in Medicine

I really need help with the construction of a whisper dish, and would be really thankful and gracious, if I could find an answer from the geniuses out there, on how to build a whisper dish, along with construction materials needed, dimensions, and procedure; Or a helpful link; Or both, if possible.

2007-12-09 20:08:34 · 1 answers · asked by atraveli8 2 in Engineering

?

2007-12-09 20:05:44 · 14 answers · asked by cucumis_sativus 5 in Zoology

(levitation, telekinesis, whatever else people keep asking in this section) come as an accessory to something else (the Buddhist illumination, shamanistic rebirth, asceticism in Christianity but not only) and trying to develop 'the accessory', the effect only, without the found, the cause, is a wrong attempt?

Again, I'm not talking about religions, but the 'spiritualistic' perspective one can have without being affiliated to a specific doctrine.
Mind over matter, spirit above flesh... stuff like these?

2007-12-09 19:53:01 · 13 answers · asked by Mirko 7 in Parapsychology

Let S and T be (not necessarily disjoint) subsets of a finite group G. Prove that either G = ST or |G| >= |S| + |T|.

I just can't get a grip on where to start with that problem.

2007-12-09 19:38:22 · 1 answers · asked by Curt Monash 7 in Mathematics

2007-12-09 19:33:45 · 5 answers · asked by lovelystarr_86dl 1 in Mathematics

While the Sun undoubtedly impacts us every second (in ways both seen a positive and negative), what effect is imposed on us by the energy of those other stars light-years away?

While it does take longer for their energy to reach us, it is undoubtedly arriving here (no matter how delayed); as such does the heat, light, magnetic waves, radio waves, ect, have any notable impact on us whatsoever? What about their gravitational pulls, no matter how far away?

Thank you in advance for your answers, I have been able to find little online about this (though I may be asking Google the wrong question).

2007-12-09 19:22:40 · 6 answers · asked by Andrew C 1 in Astronomy & Space

there would be a comet striking the earth that was big enough to destroy all life on the planet in the next 12 hours. it is big enough to knock earth completely off of its orbit, causing it to fall into the sun within a week after impact.

how would you react to hearing this?

2007-12-09 19:21:06 · 41 answers · asked by this is my avatar 4 in Astronomy & Space

2007-12-09 19:16:46 · 18 answers · asked by Andrea G 1 in Zoology

have been in the ground for 100 million years, what fraction of the initial C-14 atoms is still there? (t1/2 = 5,370 yrs)

a. 0
b. 1 x 10^[-]10
c. 5.7 x 10^[-]5
d. 1.0 x 10^[-]3
e. 5.7 x 10^[-]1

Not sure how to answer this. Could you please show me the steps in your result so that I'll have a greater understanding of the problem?? (TIA)

2007-12-09 19:08:47 · 4 answers · asked by xxxladyxxx 1 in Chemistry

1. Prove that Im(xy) = Re(x) + Im(x)Re(y)
for x = a + bi, y = c + di, i = imaginary

2. If z + 1/z is real, prove that either Im(z) = 0 or |z| = 1
for z = x + yi

2007-12-09 19:08:22 · 1 answers · asked by daNCeGurU 2 in Mathematics

(7-3i)(3+i)

2007-12-09 18:55:19 · 7 answers · asked by *TiNK* 3 in Mathematics

A 36 Kg child is in a swing that is attached to ropes 2.10 m long. The acceleration of gravity is 9.81 m/s^2. Find the gravitational potential energy associated with the child relative to the child's lowest position under the following conditions:

a) when the ropes are horizontak
b) when the ropes make a 32.0 angle with the vertical
c) at the bottom of the circular arc

2007-12-09 18:54:12 · 2 answers · asked by Gladys 1 in Physics

hello. can you please explain how to graph rational functions. i'm really confused and i have equations like f(x)= x^3+1/x^2-4. and (x+2)(x-1)/(x-3)

2007-12-09 18:53:57 · 1 answers · asked by shelykid 2 in Mathematics

it was really cool and if any doctors or nurse who are up and can tell me what it is and how it works on your brain--pts to a well informed answer

2007-12-09 18:52:43 · 4 answers · asked by Anonymous in Medicine

2007-12-09 18:47:32 · 6 answers · asked by gr8ventura 1 in Mathematics

2007-12-09 18:45:34 · 14 answers · asked by john a 2 in Physics