Science & Mathematics - 17 September 2007

I have this drawing I have to interpret.. What is this ''NC''?

2007-09-17 05:37:10 · 2 answers · asked by ovi.schi 1 in Engineering

2007-09-17 05:34:26 · 3 answers · asked by Sidereal Hand 5 in Chemistry

please help!

2007-09-17 05:34:15 · 17 answers · asked by sand_illusions 4 in Mathematics

The sum of the digit of a three-digit number is 11. If the digits are reversed, the new number is 46 more than five time the old number. If the hundreds digit plus twice the tens digit is equal to the units digit, then what is the number?

2007-09-17 05:32:14 · 5 answers · asked by Anonymous in Mathematics

what happened to the alien at area 51 after the so called interview? did it pass away or is it in prision or was it released? please be serious! i have to do this for an essay on area 51 alien interview. it is a stupid subject. space teacher is a alien freak! can you give my the website you got the answer from

2007-09-17 05:31:59 · 9 answers · asked by Dude 3 in Astronomy & Space

2007-09-17 05:29:15 · 8 answers · asked by Corey B 1 in Mathematics

how can we feel WAITLESS on earth

2007-09-17 05:28:58 · 19 answers · asked by Anonymous in Physics

two ways to ask this, is nasa polluting the universe by sending massive filled gas rockets into space, and it may be indirect abuse but it none the less is happening, (not expert) feel free to think about this , i'll look it up. the simplest way yet not acheived so far is solar rockets, and lunar powered. hope this question finds someone who has a great response.

2007-09-17 05:24:32 · 7 answers · asked by Anonymous in Astronomy & Space

1.) The height of a helicopter above the ground is given by h = 2.65t3 , where h is in meters and t is in seconds. After 2.05 s, the helicopter releases a small mailbag. How long after its release does the mailbag reach the ground?

2.) A car accelerates at 2.25 m/s2 along a straight road. It passes two marks that are 27.0 m apart at times t=3.85 s and t=4.90 s. What was the car's velocity at t=0?

3.) A parachustist jumps from an airplane and freely falls y=54.6 m before opening his parachute. Thereafter, he decelerates at a=1.71 m/s2. As he reaches the ground, his speed is
3.12 m/s. How long was the parachutist in the air?

4.) At what height did the parachutist jump from his plane?

5.) A very silly person, intent on catching pigeons on the roof of an apartment building, trips and falls a distance of 44.0 m. She lands on a metal garbage can, crushing it to a depth of
0.479 m and walks away without having been seriously hurt. What acceleration did she exp

2007-09-17 05:21:38 · 1 answers · asked by killakam 1 in Physics

lim (sin2h) (sin3h)/(x^2)
x->0

2007-09-17 05:17:33 · 3 answers · asked by jjenk32 1 in Mathematics

2007-09-17 05:10:32 · 12 answers · asked by Anonymous in Astronomy & Space

my friend told me this i thought it would be impossible but he says its not cos they are going at night..anybody else know of this?

2007-09-17 05:03:14 · 16 answers · asked by Anonymous in Astronomy & Space

a footballer is taken into hospital with a suspected broken fenur (bone in top part of the leg). Explain why the radiologist places places a thin sheet of lead over his reproductive organs prior to taking an x-ray

2007-09-17 04:59:39 · 5 answers · asked by lozzy!! 1 in Biology

For how long have people actually started to worry about it?
It's a fairly recent concern is it not?

2007-09-17 04:56:30 · 9 answers · asked by Anonymous in Weather

Is the only evidence we have for dark matter the fact that there is a lack of "visible" matter we can detect to account for the gravity holding galaxies etc together? Is there any other evidence?

If there is none is it not possible that we have something fundamentally wrong with our understanding of gravity itself?

2007-09-17 04:55:21 · 9 answers · asked by Zane Chaos 1 in Astronomy & Space

2007-09-17 04:50:57 · 3 answers · asked by Itaska 1 in Engineering

perfect seeing and plenty of sunshine and no nearby obstructions/turbulence generators or forest fogs - what magnification do you think a 70mm f/14 achromatic refractor can acheive without a loss of contrast or image blurring?

2007-09-17 04:46:27 · 3 answers · asked by OK 1 in Astronomy & Space

Why should a doctor have knowledge about physcial and chemical properties? How will this help them in their career?

2007-09-17 04:43:56 · 3 answers · asked by sunita s 1 in Medicine

four point seven times ten to the power of negative three
4 . 7 x 10 ^ - 3

does the negative power make it a fraction or a negative number

2007-09-17 04:42:15 · 10 answers · asked by Anonymous in Mathematics

2007-09-17 04:39:51 · 1 answers · asked by Will Mundy 3 in Botany

It's been a while I took Physics and, being an engineering course, the emphasis was on Newtons's Physics.

In a relativistic context, how should we interpret classical equations like f = ma (f, force, m mass, acceleration). Is it still true that v = ds/dt (v the velocity vector, s the dsplacement vector and t the time). I think this has to do with Lorentz transform, right?

In electromagnetism, are results like Maxwell's equations and Biot Savat Law still valid?

Thank you

2007-09-17 04:38:28 · 6 answers · asked by Steiner 7 in Physics

2007-09-17 04:37:26 · 1 answers · asked by gldnsilnc 6 in Medicine

2007-09-17 04:36:31 · 3 answers · asked by jinRisse 2 in Engineering

Is the following description correct?

Time Domain Analysis
x axis (time) against y axis (amplitude)

Frequency Domain Analysis
x axis (frequency) against y axis (amplitude)

Frequency domain analysis = spectrum domain analysis = find out the signal's spectrum?

2007-09-17 04:35:20 · 2 answers · asked by margaret 1 in Engineering

Please list five (5) answers. If you do more, I'll give you best answer.

2007-09-17 04:32:03 · 2 answers · asked by Brian 2 in Earth Sciences & Geology

2007-09-17 04:31:38 · 1 answers · asked by Anonymous in Biology

Example: 2x+3y=1
5x+3y=16

2007-09-17 04:29:52 · 8 answers · asked by flamingo 2 in Mathematics

Example: 2x-y=4
2x-y=6

2007-09-17 04:27:50 · 3 answers · asked by flamingo 2 in Mathematics

If so, do the potential benefits of ES cell research outweigh the ethical objections? Explain

2007-09-17 04:26:18 · 13 answers · asked by Angela L 1 in Biology

Alaska is getting more rainfall and temperature is increasing

2007-09-17 04:24:41 · 5 answers · asked by 1popayanco 2 in Earth Sciences & Geology