I heard some nice things about my students today! Hooray!
Thank you Francisca and Dulce for being helpful in class. Your attitude in period 2 really brightens my day and I am sure is good for Ms Yoshizumi. I hear that Fabiola is learning some good physics!
Parker...did you break my Newton's Cradle?? Or was is Lenny? Leeennnnnnyyy! I wish I could be there.
Thank you Michael and Corina from period 6. We definately need to recycle! Did Ms. Yoshizumi find the recycle bin that is in the storage room (Area 51)?
Please continue to learn and be nice to Ms. Yoshizumi. I will return after Spring Break! (Too bad Lenny. I am the boss. That is my classroom. : ) Can you believe we get a two week break this year???
Any questions regarding thermodynamics? Email me woodsphysics@yahoo.com or post a comment to the blog.
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3 comments:
6th period has a few questions for you (hopefully none that will challenge you too much).
1. What is the airspeed velocity of an unladen (African or European) swallow? (You must know where this question came from. If not, ask you husband.)
Now for the REAL Physics questions!
2. Why does the existence of cutoff frequency in the photoelectric effect more strongly favors a particle theory than a wave theory of light?
3. If an x-ray photon is scattered by an electron, does its wavelength change? If so, does it increase or decrease?
4. In both the photoelectric effect and in the Crompton effect a photon collides with an electron causing the electron to fly off. What then is the difference between the two processes?
5. Is the Cosmic Censorship Hypothesis true? Roughly, for generic collapsing isolated gravitational systems are the singularities that might develop guaranteed to be hidden beyond a smooth event horizon? If Cosmic Censorship fails, what are these naked singularities like? That is, what weird physical consequences would they have?
6. What is the correct theory of neutrinos? Why are they almost but not quite massless? Do all three known neutrinos--electron, muon, and tau--all have a mass? Could any neutrinos be Majorana spinors? Is there a fourth kind of neutrino, such as a “sterile” neutrino?
7. Are there important aspects of the Universe that can only be understood using the Anthropic Principle? Or is this principle unnecessary, or perhaps inherently unscientific?
8. Is quantum chromodynamics (QCD) a precise description of the behavior of quarks and gluons? Can we prove using QCD that quarks and gluons are confined at low temperatures? Is it possible to calculate masses of hadrons (such as the proton, neutron, pion, etc.) correctly from the Standard Model, with the help of QCD? Does QCD predict that quarks and gluons become deconfined and form plasma at high temperature? If so, what is the nature of the deconfinement phase transition? Does this really happen in Nature?
9. Does Quantum Uncertainty apply in Relativistic effects?
10. What causes sonoluminescence?
11. The Navier-Stokes equations are the basic equations describing fluid flow. Do these equations have solutions that last for all time, given arbitrary sufficiently nice initial data? Or do singularities develop in the fluid flow, which prevent the solution from continuing?
12. How can we merge quantum theory and general relativity to create a quantum theory of gravity? How can we test this theory?
13. When you have two mirrors facing one another it gives the illusion that it goes off for infintie though why does it curve?
You guys are funny! Now SOME answers to your questions...
1. Of course, the airspeed of an unladen swallow is not the real question. The real question is.. What is the airspeed velocity of an African swallow when carrying a 5 pound coconut? It is not a question of where he grips it!! Perhaps 2 birds carried the coconut. They could have had a tether...
P.S. Mrs. Woods had to show Mr. Woods the movie in question - Monty Python and the Holy Grail. Just for interest, Mrs. Woods made a documentary last year on solar power - we hired John Cleese to narrate!!
Now where did all of these funny questions come from...Some make sense to me and some do not...
2. What this suggests is that the light has to have a sufficient amount of energy to eject an electron from the surface of a metal. If light behaved like a wave in this case, it would seem that you could just turn up the intensity of the light wave and eject electrons - but this does not happen. Only when light reaches a certain frequency (independent of intensity) an electron will be ejected. The light behaves like a "bowling ball"(photon) knowcking a "pin" (an electron) out of the metal. A complete description of this effect earned Einstein his noble prize. Incidently, his ex-wife (also a physicist) received the prize money. :)
3.An x-ray photon scatters an electron giving some of its energy to the electron. Because the x-ray lost energy, its wavelength would increase. It is simple conservation of energy.
4.Photoelectric effect photons eject electrons that are trapped inside a metal. These electrons must be (sort of like) ionized from the metal. Many different frequencies of light can eject these electrons. It depends of the metal that the electron resides in.
In the Compton effect, we are discussing an interaction between a free electron and an X-ray photon.
5. I haven't studied about Cosmic Censorship. I am sure that this is a consequence of Einstein's General Relativity. I will look up this topic and see what I can learn.
6.If you find the correct theory for neutrinos, you will win the Nobel Prize. I believe that scientists are trying to determine if the neutrinos have mass. Neutrinos are typically released in nuclear reactions inside stars. It depends on which nuclear reaction is occuring which neutrino will be produced. Scientist have hypothesized that these neutrinos could be the "dark matter" that scientist have been looking for if they are found to have mass. There is a huge underground experiment in Texas(?) thats focus is trying to capture neutrinos.
7. Another one that I have not heard of..I will get back to you.
8. Yet another. I studied QED in college, not QCD. I will look into it.
9.The uncertainty principle always applies.
10. sounds or vibrations
11. Equations that can predict fluid flow are very difficult and not yet complete. Mostly, scientist must use approximations to solve real life examples of fluid flow. One example of this is meteorology. This is why the weather forecast is not a certainty. The conditions and chaos that occur in real life hydrodynamics are very difficult indeed.
12. If you find out, you will win the Nobel Prize...
13. This is a fascinating question. I am going to have to think about this one. You got me on several of these.
Many of these questions are AP Physics type questions. If you are really interested, I suggest you study hard in your math and science classes and enroll in AP Physics in your senior year.
That was fun! Physics Nerd Rule!
Period 3
Why do we have a test because we haven't learned anything.....not anything it is not fair for us to have a test. Because we have not learned one thing!! Except when you were here. Please tell the sub for us not to take the test because all we have been doing is writing the text from the text book onto our papers, so we do NOT KNOW ONE THING AT ALL!!! It is not fare of you to do this to us. Because if we get the test everyone will get HIRRIBLE grades!! we are mad!!!
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