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 Posted: Wed May 30, 2007 1:30 pm
I was playing the Yes or No game over in GD yesterday and I came up with the idea to start a science edition of it. The goal is to extend your knowledge as well as let you show off any prior knowledge you have. All science, math, or history questions are allowed, no matter how trivial or difficult.
The rules are:
1) Reply "yes" or "no" to the question above your post. For either answer, you must also provide at least one sentence explaining what the answer is in your own words. Cite sources if necessary. If you do not understand the question, just say so and proceed with your own question, as I understand that there are people of all scientific backgrounds on here.
2) Then ask your own science, math, or history question.
Example:
First post:
(No prior questions.)
Do you know what E equals besides mc^2?
Second post:
Yes. It equals h*nu, where h is Planck's constant and nu is the frequency.
Do you know the difference between 1e3 and 1*e^3?
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Posted: Wed Jun 06, 2007 6:54 am
Yes.
Exponents seem to be a little weird on this computer, but anyway. 1*e^3 is Euler's number cubed, while 1E3 is either Euler's number times 3 or 1 times 10 cubed.
Hmm...
Can an s orbital hold more elctrons than a p orbital?
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Posted: Sat Jun 09, 2007 8:28 am
Saeric Yes. Exponents seem to be a little weird on this computer, but anyway. 1*e^3 is Euler's number cubed, while 1E3 is either Euler's number times 3 or 1 times 10 cubed. Hmm... Can an s orbital hold more elctrons than a p orbital? yes. I only have an eigth grade scientific education, but I believe an s orbital holds more protons and needs more balance. or something along those lines. could communism have truly worked if the party had become univrsal?
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Posted: Sun Jun 10, 2007 6:45 pm
If it had become TRULY universal, then yes. For example, communism works in ant colonies, although even in that example there is a dictator of a sort. I think ant colonies also show that communism could only work if all the followed believed strongly in a single goal and were willing to give their lives for the cause. In practice, however, humans tend to be too self-oriented to be able to live in a truly communist society.
Do you know what luminiferous æther is? (Bonus: Do you know what toxic metal helped disprove its existence?)
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Posted: Fri Jun 15, 2007 6:41 am
Saeric Yes. Exponents seem to be a little weird on this computer, but anyway. 1*e^3 is Euler's number cubed, while 1E3 is either Euler's number times 3 or 1 times 10 cubed. Hmm... Can an s orbital hold more elctrons than a p orbital? Actually, the question appears to be worded misleadingly here. It is true that an s orbital CAN have more electrons than a P orbital, but only in rare cases like Beryllium. But I think the question meant ask, which orbital has a higher capacity, s or p? And the answer there is p. Quote: Do you know what luminiferous æther is? (Bonus: Do you know what toxic metal helped disprove its existence?) The supposed medium of light particles. Lead. What profession most uses the square root of negative one in their calculations?
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Posted: Fri Jun 15, 2007 9:00 pm
Quote: The supposed medium of light particles. Lead. Actually it was mercury. They set a laser on a pool of mercury and spun it around to show that the speed of light was the same in every direction. The theory of aether would have required that light move at different speeds in different directions based on the local velocity (of the earth) -- called the aether wind effect. This laser experiment is the famous Michelson-Morley experiment. Quote: What profession most uses the square root of negative one in their calculations? From personal experience I would have to say electrical engineering. Since my second year of college I have not gone one day without converting a cosine into an exponential in order to integrate it more easily or used a formula that comes with an imaginary component already in it, such as the conversion from electric field E to magnetic field H. Also, capacitors and inductors have imaginary components to their resistance, so merely looking at a capacitor is looking at the embodiment of an imaginary number. smile Do you know what the difference between a diesel engine and a combustible engine is?
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Posted: Sun Jun 17, 2007 12:52 am
jiesa Quote: The supposed medium of light particles. Lead. Actually it was mercury. They set a laser on a pool of mercury and spun it around to show that the speed of light was the same in every direction. The theory of aether would have required that light move at different speeds in different directions based on the local velocity (of the earth) -- called the aether wind effect. This laser experiment is the famous Michelson-Morley experiment. Ah, yeah, I was thinking of the Hamar experiment.. Quote: Do you know what the difference between a diesel engine and a combustible engine is? Diesel engines are internal combustion engines... But the main difference between gas and diesel engines would be the fuel type mrgreen BUTTT, I think you meant operational differences ;] Main difference is spark vs compression ignition. What is a Faraday Cage?
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Posted: Sun Jun 17, 2007 12:55 pm
A Faraday cage is literally just a cage made of electrically conducting material (metal). The thing that makes the cage a Faraday cage is that the cage has a top, a bottom, and four sides made out of metal or metal mesh (although it can be spherical in shape and not just a box). In a simplified model, this makes it so that if an external electric field is applied to any part of the cage, the applied electrons are redirected by the metal so that they don't get inside the cage (i.e. the field is redirected around the outside of the cage and does not penetrate it). A more complex model would explain that an equal but opposite electric field is created on the surface of the cage, nulling the incoming field. But really they are the same explanation.
Do you know one easy test for anisotropy? Now that you can test for it, can you tell me if you know of any anisotropic materials that you yourself tested? (Do not give an example shown on a website unless you have tested the material yourself! If nothing you tests works then just say so.)
(Background: Isotropic materials have the same index of refraction in every direction, while anisotropic materials do not. There are multiple ways to test for anisotropy, but isotropy is harder to test for since you must use a process of elimination.)
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