Science & Mathematics - 17 December 2006

is the cardinality of the set of real numbers equal to the cardinality of the set of real numbers cross itself?
ie is card(R) = card(RxR)?

i can find an injection from R to RxR (which implies card (R) <= card (RxR) ) but not a bijection.

2006-12-17 03:12:22 · 3 answers · asked by Milo 4 in Mathematics

chem lab=worse subject and its not in my text book

2006-12-17 03:11:25 · 4 answers · asked by cookiemonstah 4 in Chemistry

examples of solution, suspensions and colloids

2006-12-17 03:08:16 · 2 answers · asked by Besy 2 in Chemistry

Can I increase the size of my skull by doing or eating something? From the top of my ears all around (the crown)? It is unproportional to the rest of my face. My face looks big and my crown is significantly smaller.

2006-12-17 03:08:15 · 4 answers · asked by Anonymous in Biology

Did they figured out that the earth could be a dangerous place for them(because of the wars) and decided to detonate some nukes on their continent in order to sink it, and then flew to some other planet?

2006-12-17 03:07:25 · 3 answers · asked by t_mann 2 in Geography

Can someone explains to me what is it about? Like if a guy gets more female hormones does he act girly? And how are the hormones distributed?

2006-12-17 03:07:13 · 2 answers · asked by Anonymous in Biology

..or is that a stupid question...my guess is the latter half

2006-12-17 03:06:56 · 8 answers · asked by jlp.media 3 in Engineering

& a passenger walked up the carriage,would they be then be travelling faster than the speed of light?

2006-12-17 03:05:02 · 16 answers · asked by curious_2006 1 in Physics

Is there a civilization living underground (beneath earth's surface) somewhere at the north pole? It is said that they are more advanced than us, are rather tall, and built their own "sun". They also have well organized cities, complete with vegetation and some wildlife.

2006-12-17 03:02:33 · 1 answers · asked by t_mann 2 in Geography

or any other object? I need about 8 different parts that can compare to a car.

2006-12-17 03:01:58 · 6 answers · asked by Anonymous in Biology

Can anyone describe or point me in the right right direction as to what relationship activation energy and the collision theory have?

2006-12-17 03:01:06 · 2 answers · asked by Anonymous in Chemistry

Chemistry Please Tell me WHAT is the difference between 2N AND N2 (2) IS A Subscript.

2006-12-17 02:59:23 · 4 answers · asked by CHONA K 1 in Chemistry

2006-12-17 02:59:22 · 3 answers · asked by pumakelmusa 2 in Zoology

What was the MSRP for a Hummer H1 that sold for $107,272 after an 8% discount?

2006-12-17 02:58:23 · 4 answers · asked by salarian2001 2 in Mathematics

2006-12-17 02:54:43 · 31 answers · asked by curious_2006 1 in Physics

to the observerble universe,what about the areas of the universe that evade the human senses,could there be faster things that we are unable to study due to them being beyond our perception yet exist in the same universe as us

2006-12-17 02:53:37 · 7 answers · asked by gasp 4 in Physics

By Maxwells Classical Theory of Light, Light is a wave, by to Planks quantum Theory,Light is emmited in smal packets of energy caled "photon".
Some Properties of Light r Explained Properly By Huygens theory, which had dawbacks,Which were corrected by maxwell
Propetries of Light Such as relfection, refraction, polarisation, Diffraction, INTERFERENCE are explained by wave thory, Light Behaves as electro magnetic radiation
Some other Phenemenon like Photoelectric effect are explained by Quantum theory, Which states that one photon is Min amout of energy dat r emmited by a source.
We know that Nothing can escape the black Hole, not even Light, Wht do u think gets pulled in the black hole? the WAVE ? or photons ? Since photons are particles of matter ?
Rutherford model of h2 atom Failed, it was baised on maxwells wave theory,bohrs model of h2 atom is correct. Bhor formula (which depends on plank Q theory) is "1/λ = R(1/p²-1/n²)" in formula Wavelenght is involved. Why how ?

2006-12-17 02:53:30 · 4 answers · asked by Anonymous in Physics

2006-12-17 02:47:14 · 7 answers · asked by Donald C 1 in Mathematics

Suppose that a line of 1km is drawn at an angle of 1 degree. Suppose that a perpendicular is drawn from the end point of the 1km line to the centre line(180 degrees), what would be the length. Also let me know the procedure to find this.

2006-12-17 02:44:03 · 3 answers · asked by amir 1 in Mathematics

If the car goes from 0 to 80 mph in six seconds with constant acceceleration, what is that acceceleration?


I asked "2" time but there was a good answer. This is calculus related to physical problem. The question is RIGHT, I did check before posting.

the right answer is 19.55 ft/s^2 ( in the back of the text book)

mph = mile per hour
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If someone how to get 19.55 ft/s^2, please help me

2006-12-17 02:42:56 · 5 answers · asked by Anonymous in Mathematics

This is for my freshman biology class so please dont make it too complicatd for me to understand.

2006-12-17 02:42:16 · 1 answers · asked by JujuBee 1 in Biology

2006-12-17 02:39:05 · 15 answers · asked by jessicadawn_20yr 1 in Mathematics

If the car goes from 0 to 80 mph in six seconds with constant acceceleration, what is that acceceleration?

2006-12-17 02:35:19 · 11 answers · asked by Anonymous in Mathematics

Find a model for every phrase where the phrase is not true:
(1) Ax Ey Pxy → Ey Ax Pxy
(2) Ax (Qx or Rx) → (Ax Qx or Ax Rx)
(3) (Ax Sx → Ax Tx) → Ax (Sx → Tx)

(A = for all, E = there exists)

2006-12-17 02:30:10 · 3 answers · asked by laurentvanwinckel 2 in Mathematics

i don't know to much about it that is just what is on my paper i have more that i need help with

2006-12-17 02:30:01 · 14 answers · asked by jessicadawn_20yr 1 in Mathematics

Its one of the first things they teach you in physics class: Energy can neither be created nor destroyed, only converted from one form to another. Yet gravity seems to create energy out of nothing.

Is there an accepted answer for this question?

2006-12-17 02:26:16 · 13 answers · asked by IndigoShades 2 in Physics

2006-12-17 02:25:59 · 5 answers · asked by mytie123 1 in Geography

2006-12-17 02:25:50 · 12 answers · asked by Anonymous in Medicine

2006-12-17 02:24:09 · 8 answers · asked by Richard P 1 in Astronomy & Space

2006-12-17 02:22:58 · 20 answers · asked by Gina N 1 in Mathematics