The Character of Physical Law Custom Essay

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1. What is conservation (what does it mean for something to be conserved)and why is it important? What is locality (what does it mean for something to be local)? How are they related? Upon what principle did Einstein prove this relation (i.e., name and briefly explain the idea on which Einstein based his argument).
2. According to Feynman, why is charge a thing” but energy is abstract,purely mathematical”? (62, 70) (What three qualities does charge have that make it a thing [the three in common with baryon number]? Which of those does energy have too and which important one does it lack? Why is it an important quality [Give your opinion or Feynman’s].)
3. Briefly describe the two photon polarization experiment (three devices and an important relationship between two of them). In this experiment, what two values are being compared? What does Bell’s Theorem say about those two values (need not say any math)? What is the signi cance of these values violating Bell’s Theorem? Why is the speed of light important?
4. What is ‘grue’? Explain the problem grue holds for science by comparing these two law-like statements: all emeralds are green” and all emeralds are grue.” How is this problem (of grue) a version of the problem of induction? One solution to the grue problem is to say that ‘grue’ is an inherently time-indexed concept; why is that important and
why is it not conclusive?
5. What is Galileo’s principle of inertia and how does it relate to Newton’s idea of ‘force’? What question about planetary motion is the force of gravity an answer to? What were Newtons two great insights about the force of gravity? Each insight was equivalent to one of Kepler’s laws of
planetary motion, which to which (state and briefly explain the law)?
6. On page 21, Feynman discusses how Newton tested an idea of his and concludes: This was a dramatic test that everything is all right.” What was the idea that Newton tested? How did he test it (what did he examine and what was he hoping to see)? Why does Feynman think the outcome was so signi cant (i.e., why does the result demonstrate dramatically” that Newton’s idea was right).
7. On pages 50-52, Feynman gives three statements of the Law of Gravity. Briefly explain each of them (say how they look”, if you like). In what sense are they all they same? Nonetheless, Feynman says one of them is hopelessly inadequate,” which one and why? Between the other two,
how are they different and why might that

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