| Subject | Date Asked |
|
| LHC Probing the Improbable | 1/22/2009 |
Q: I had this article delivered in my mail today and I'm rather concerned on what is stated here! Would ...
A: First, thanks very much for that link. My first impression is that there's a lot of pages to state ...
|
| extrasolar spectrum | 1/20/2009 |
Q: Gort, thanks for making yourself available. I teach art in Philadelphia. Our sun appears yellow ...
A: Yes, our sun is indeed yellow, but not "very' yellow. Its light is comprised of all the colors in ...
|
| right ascension and declination | 1/4/2009 |
Q: can you tell me how to first convert an example: 0hours 8min. 23.2 seconds to degrees for right ...
A: The easiest way is to set up ratios. For example, there are 60 seconds in a minute and 60 minutes ...
|
| Why sky is dark? | 5/2/2008 |
Q: i have heard that sky is dark because universe is young.that's why light from distant star has not ...
A: While it is true that some stars are forming at distances such that their light has not yet reached ...
|
| Fermi acceleration | 4/22/2008 |
Q: Can you explain a bit about how Fermi acceleration works and how one can best quantify it? Thanks!
A: This is a difficult one. I'm not sure on your background in physics. So my answer might be too ...
|
| gravitation | 9/14/2007 |
Q: can you explain the universal law of gravitation?
A: Sir Isaac Newton first wrote down the universal law of gravitation, saying that any two masses ...
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| Colapsing Universe | 9/13/2007 |
Q: I gave it a bit more thought to the imaginary universe which you so elegantly explained to me, when ...
A: I think the rules also need to account for photon emission. For instance, in thermodynamic ...
|
| planets | 5/29/2007 |
Q: how many stars appears in our sky?
A: In any one night, we could see about 6000 stars with the naked eye. But there are about 100 billion ...
|
| planet x | 5/29/2007 |
Q: what do you know about the new planet x?
A: You're probably referring to the discovery in April of an "earth-like" planet about 20 light-years ...
|
| Speed of light | 5/27/2007 |
Q: The Science says that if you travel to the nearest stars at the the speed of light time will seem ...
A: Yes, if the distance is shorter, less time will have elapsed. If you travelled to a star 10 ...
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| Light | 5/22/2007 |
Q: What happens to light once its source stops producing it, e.g. when a candle is blown out? Also, ...
A: When a candle is lit (or a laser is turned on), some of the chemical energy (or electrical energy in ...
|
| accretion disk around a black hole binary | 5/8/2007 |
Q: .. I'm struggling on another that I hope you can give me a hand with. The question is: This problem ...
A: 1) Without plugging in actual numbers, I would guess that your graph has the right form. For ...
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| Vector Mechanics | 5/7/2007 |
Q: I've been looking at vector mechanics applied to phycical problems and I am stuck on one aspect ...
A: Scalar products are actually easier to understand than cross products. The definition of a scalar ...
|
| Speed of Light - Special Relativity Postulate | 4/27/2007 |
Q: I have a degree in Physics with Astrophysics, and enjoyed and understood everything that I was ...
A: It certainly helps in formulating the answer! 1) Let's start with Newtonian mechanics. If A is ...
|
| Wind due to acceleration of earth? | 4/25/2007 |
Q: I'm not really sure what subject area this question falls into but I figured astrophysics is a good ...
A: That's an interesting problem. Let me begin with your stated hypothesis - no temperature or ...
|
| Eddington Limit | 4/16/2007 |
Q: How are you? Very well I hope! I have a problem that I really need a little hint on if you don't ...
A: Looks like a good problem! OK, I'll give some hints: I'm not sure why you mention Wien's Law. ...
|
| Geometery/dimensions/matter displacement | 2/28/2007 |
Q: Greetings Professor. I hope I'm not monopolizing your time. I appreciate the answer you gave to my ...
A: No problem on the time. I see you've been thinking this through! First, answers to some of your ...
|
| space time | 2/27/2007 |
Q: Does time stop when you reach the boundary of the finite universe? If the universe was a ...
A: Yes, you could say that "time stops" outside of the space-time boundary of the universe, in the ...
|
| MOVE | 1/26/2007 |
Q: Why do molecules in a solid move more slowly thanb tthose in a liquid? What is it about the ...
A: To answer your question properly, I need to explain the states of matter and the reason for solids, ...
|
| Anti_matter | 1/15/2007 |
Q: Does anti-matter fall up or down?
A: Anti-matter falls down. Although many properties of anti-matter are the opposite of ordinary ...
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| Stopping_light | 1/15/2007 |
Q: Can light be stopped? If yes, the how?
A: No, light cannot be stopped. It can only be absorbed and emitted. Even reflection of light is not ...
|
| seeking a mathamatical concept... | 1/8/2007 |
Q: i love the fact that the world is mathamatical. i would like a tatto or tattos of mathamatical ...
A: I've given this considerable thought. Since mathematical concepts are usually expressed in the form ...
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| Universe. | 12/19/2006 |
Q: How would a photon behave in a universe where all dimensions are collapsing at the speed of light?
A: I'll give you my best guess on this one. It's certainly an interesting question! According to ...
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