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Blog Comments posted by FizziksGuy

  1. If such a technology did take off, do you think there could be any environmental repercussions due to the energy transfer from the wind into electrical power? How widespread would such wind generators have to propagate before there would be significant climatological effects? How would those effects be manifested?


    half way done!

    The good news and the bad news... E&M does involve probability and imaginary numbers. Probability at the nano-scale (which we may talk about with a guest speaker on Wednesday), and imaginary numbers first come into play in dealing with AC circuits. And we won't get into much depth with either of those in this semester.

  2. Great point -- Richard Feynman did an amazing job of bringing complicated physics to the masses, and his lecture series is probably the most famous recording of an educational lecture in our history to date. Microsoft hosts 7 of the famous Feynman Lectures online at their Project Tuva site... check it out!

    To provide an idea of just how amazing he truly was, check out the first statement students heard in his introductory physics course at Caltech in the early 1960s.


    (PS, his lecture series was recorded and transcribed, along with pictures of his blackboard drawings, to create one of the most popular physics books of all time)

  3. I don't think you're alone... so far you've always known what unit you've been working in, but now that we've covered a typical college semester at a high level, having things jumbled together isn't uncommon, especially after a long break. The good news -- we have one or two more days of material to cover, then we have a chance to sort everything out as we prepare for the mid-term. Take this time as an opportunity to clarify and organize your thoughts, to figure out your strengths and weaknesses -- then attack the weaknesses, and fortify the strengths.

    You know more than you think you do... our first WebAssign practice MC test is designed to be a tough one... an exam to help you realize where you need to work -- but not in a comfortable way. Use it as it was intended -- a tool to help you focus your efforts moving forward. And if it rattled you a bit, perhaps that's not a bad thing either -- but don't let it throw you from your course!

    Energy and persistence conquer all things.

    Benjamin Franklin


    Warp Drive

    No apologies required for String Guess... it's a very slick theory, and would be awfully nice if it were true -- just hard to call it a theory without any evidence!

    So many things yet to discover -- how many will we get to in our lifetimes?

  4. I'm still a fan of the femto-elves with pointed hats taking tethers and pulling objects with mass toward each other... but assuming that ISN'T really the case, there's a lot to be said for Einstein's general relativity making intuitive sense -- no supporting data, but it does seem to make intuitive sense and relate well to our understandings of the universe.

    Now, having said that, my giant beef with string theory is the fact that there's no supporting evidence, yet it's become extremely popular because "the math works out well." Hypocritical? Absolutely... so we keep searching for answers!

    Guest Elliott56


    So, masses attract each other... opposite charges attract each other... opposite poles attract each other. We can have individual masses. We can find individual opposite charges. Have we ever found an individual magnetic pole (a singular north or a singular south pole)? If you find a magnetic "monopole," take very good care of it, write a paper about it, and send me a picture when you win your Nobel prize!

  5. I've also seen the sweet spot modeled by looking at the nodes and antinodes in a bat http://www.physics.usyd.edu.au/~cross/baseball.html.

    You can also find the Physics of Baseball as part of a freshman physics course here: https://teamphysics.physics.uiuc.edu/SiteDirectory/PHYS199BBBlog/default.aspx

    And of course, KQED Quest's Physics of Baseball videos, which we often show in class... http://www.kqed.org/quest/television/out-of-the-park-the-physics-of-baseball

  6. Sounds like a good start... :D how are you feeling after a couple more days of letting it sink in? Remember period (T) is the time for one complete revolution (take total time, divide by number of revs) and frequency is the number of revs per second (take # revs, divide by total time). If you know one, you can find the other:

    png.latex? f=\frac{1}{T}

    png.latex? T=\frac{1}{f}

    You can also check out the review guide (with examples) on Frequency and Period here: http://www.aplusphysics.com/courses/regents/circmotion/ucm.html#freqper

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