Science & Mathematics - 22 December 2007

Aren't volcanoes the "ultimate high-temperature incinerators"?

2007-12-22 00:55:19 · 9 answers · asked by Anonymous in Earth Sciences & Geology

is it produce any harmful radiations? in any time, like voltage fluctuations.. etc.?is it banned in some countries?is the daily use not recomended?

2007-12-22 00:40:09 · 4 answers · asked by Jayan P N 1 in Physics

Could it be that everything is just the warping of spacetime.

I mean, instead of having strings, and creating a frame work around it to explain everything and joining gravity with the other 3 forces, could it be that he smallest thing, be it a quark or what ever, is just a small warp of space time.

Electrons and protons etc are just a collection of warped spaces.

Their forces are a result of how much their space is warped.

Any comments, or am i just barking mad.

2007-12-22 00:37:09 · 8 answers · asked by Anonymous in Physics

2007-12-22 00:31:50 · 8 answers · asked by Anonymous in Zoology

2007-12-22 00:23:53 · 12 answers · asked by Anonymous in Geography

2007-12-22 00:12:51 · 5 answers · asked by 19G30 5 in Astronomy & Space

Santa stands at x = 0 in an infinitely long and narrow corridor (defined by the x-axis). Initially the corridor is devoid of any stink particles. At time t = 0, Santa unleashes a stink bomb (ah political correctness) which releases N stink particles at x = 0. The particles move through the corridor by diffusion only.

Little Timmy’s nose is sensitive enough to smell anything as long as its CONCENTRATION is greater than C. Concentration is defined as the number of particles per unit x distance along the corridor. In terms of N and C, how far away should Timmy stand in order to never smell Santa’s stink bomb?
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FYI: mathematically, diffusion is governed by the following partial differential equation:
∂u/∂t = D* ∂²u/∂x²
-∞ < x < ∞, t > 0
where u = concentration of particles (units: particles / distance)
and D = diffusivity of the particles in the air (units: distance² / time)

10 points for the best answer, plus a load of thumbs ups. Ha ha, load.

2007-12-22 00:08:31 · 9 answers · asked by Dr D 7 in Mathematics

2007-12-22 00:01:33 · 10 answers · asked by Susan D 1 in Geography

2007-12-22 00:01:29 · 11 answers · asked by Anonymous in Medicine