# aommaster

Senior Members

1457

1. ## combustion reactions

Ahh... a reaction looking cool. Depending on what apparatus you have, I can think of 3: 1.Decomposition of zinc carrbonate by simple heating. The zinc carbonate changes colour to yellow when heated, and then goes to an off-white colour 2.Iodine trichloride (you must have good lab eq. for this). You have to use iodine chloride, a brown liquid. When you pass a sufficient amount of chlrine gas over it, it changes to yellow crystals. Looks cool, but extremely dangerous. 3.Simple decomposition of calcium carbonate. Decompose it, add water etc. The whole cycle! Hope this helps!
2. ## Some Questions About Light

Ok. Now that makes alot of sense! Thanks for that!
3. ## Some Questions About Light

And taking a look at the equation you wrote... as the two velocities get higher, the bullet seems to travel at a speed towards infinite? I'm taking a look at the denominator. $1-v_bv_t/c^2$ if the vb and the vt get towards the speed of light, the denominator tends towards 0. What does this mean?
4. ## Black Holes and string theory?

It could be. However, the string theory states that dimensions #5-10 are all curled up inside our dimensions that we live in. It just so happens that we are too big to be able to access those dimensions. Is it a possibility that it would take use to the 11th dimension, the one where parallel universes could like? It could be, although I think that it would be pretty slim, because the branes (membranes as some know it) where our universes lie are separated. When they collide with each other, they result in a massive explosion, called the Big Bang. Of course, this is only theory, and is what the String Theory states.
5. ## Some Questions About Light

Severian: Is that the equation for special relativity? I'm also guessing that general relativity has nothing to do with it?
6. ## dimensions of a back hole?

yeah, scientists shortened the word membranes to just branes As for the M theory, I think it came about when scientists had found 5 different interpretations to the string theory. A scientist named Edward Witten unified those theories and stated that they were all different ways of looking at one single theory. It was this theory that created the 11th dimension, and hence, branes. All the other theories stated that there were only 10. It was that theory that became the M theory. More than that, I know nothing of it. Also, scientists had one more thing to figure out, what the M stood for. Som guesses are: Mystery thoery Matrix theroy Mother theroy
7. ## Some Questions About Light

If you really love maths, take a look: http://en.wikipedia.org/wiki/Gravity#Newton.27s_law_of_universal_gravitation
8. ## dimensions of a back hole?

Yes, the 11 dimensions bit was made as part of the string theory. When 11 dimensions were put into the calculation, all the eqations worked out and made sense. It states that we live in 4 dimensions. Then, 6 of the other dimensions are curled up inside our dimensions. They are too small to access. As for the last dimension, it states that on that lies something called "branes" which are stretched out strings. When the branes collide, they result is something like the big bang. Of course, this is just a theory
9. ## Some Questions About Light

Sorry, double post
10. ## Some Questions About Light

Hehe... and what's Star trek's excuse for sound of explosions? I haven't really heard of neegative particles. As for the anti-something you were talking about, could it be anti-matter? If it is, no. Anti-matter has the same properties of normal matter, such as mass, only that it has a negative charge. Also, when antimatter and matter meet, they annihilate each otehr and produce gamma waves as a result...which can then bring up the question, why is there more matter than antimatter, since when matter is created, anti matter, too, is created The graviton, scientists have not yet been able to detect, although they think it exists. Scientists saw that for every one of the other three fundamental interactions, there was an exchange particle involve, a particle that was created momentarily till the interaction was over, and then disappeard. For the strong force, it was the gluon. For the weak force, it was the W+ ,W- ,and Z0 . As for electromagnetic interaction, it was the photon. They think that gravitation, the last of the four fundamental interaction, has an exchange particle called the graviton. Hope that helps
11. ## Some Questions About Light

I hope you don't mind me asking. But I was told that if you were able to travel faster than the speed of light, you would travel back in time. Is this true? And does this have anything to do with time dilation?
12. ## Laser diffraction through a single slit

Haha.. don't you just wish you were like him??? Thanks alot guys!
13. ## Laser diffraction through a single slit

Thanks alot for that explanation Swansont! It really cleared things up. I guess I'll need to take a look at the Feynaman path integrals (by the way, is he the same scientist that created the Feynman diagrams, used for decay of subatomic particles?) Thanks alot for your time Swansont!
14. ## Laser diffraction through a single slit

Ok. Thanks alot for that! Sorry for bothering you!
15. ## The second order derivative

Oh, so its really a matter of opinion! Thanks alot for your help TD!
16. ## Weird Mars pictures

You have to take away the : confused : part in the link. Somehow, it got there by mistake
17. ## Laser diffraction through a single slit

Hehe... that ois probably why my physics teacher hates quantum mechanics. He cannot understand it. I think I just have to accept that if a photon has been given many paths to go through, it will go through all these paths, no energy is lost. It just clones itself! Is that a correct way of thinking about it?
18. ## Solubility

No problem. From now on, we'll just call it the "freezing point apparatus"
19. ## The second order derivative

The second derivative being 0 (since that is what the point of inflexion maybe)
20. ## The second order derivative

The method that I tend to use is, instead of using the double derivative, just use the single derivative for the x value before and after the point which is assumed the point of inflexion. If the sign remains constant, you know the the point is a pont of inflexion. Are there any advantages of using the double derivative instead of the single derivative?
21. ## The second order derivative

Changes sign around that point? Do you mean that the double differential changes sign in the x value before and after the point?
22. ## Laser diffraction through a single slit

This is the idea that I find really hard to grasp. HOW does it go through all possible paths? Does the photon split up? And if it does, does it loose energy during this intermediate stage? If not, does it go through a dimension that we can't sense?
23. ## The second order derivative

That's a great link Dave! Thanks for that!
24. ## Laser diffraction through a single slit

Sorry if this may sound annoying, but why can a single wave pass through both slits? How can one wave split into two? And if it does split, does it loose its energy in the intermediate stage? Thanks Swansont!
25. ## The second order derivative

Wow! That's a grat example. I admire the simplicity. Thanks alot for that!
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