10 All Homework Problems

  1. Given the amount of charge on a speck of dust and the number of protons, how many electrons are there?
  2. Common static electricity ranges from nanocoulombs to microcoulombs. How many electrons is this?
  3. Compare the momenta of elephants, humans, and tranquilizer darts!
  4. Assuming negligible air resistance, what is the final speed of a rock thrown from a bridge?
  5. How many DNA molecules can a single electron from an old-fashioned TV break?
  6. How long can you play tennis off a candy bar?
  7. How long for a car of fixed power to get up to speed?
  8. Which element has an outer electron with the lowest potential energy?
  9. Exploring the relationship between momentum and kinetic energy.
  10. What is the frequency of a stroboscope?
  11. Label the parts of a wave.
  12. If the frequency of a wave is changed, which of the other properties must also change assuming the speed of the wave remains fixed?
  13. Speed, wavelength, and frequency for sound.
  14. How long to collect a certain amount of sunlight?
  15. What is the power output of an ultrasound machine for a given intensity and area?
  16. Which situations will create electromagnetic radiation?
  17. Speed dependencies for electromagnetic waves.
  18. What is the frequency of a radio station given the wavelength?
  19. Rank the types of waves in the EM spectrum by wavelength.
  20. Find the momentum of a microwave photon.
  21. From momentum, calculate the wavelength and energy of a photon.
  22. An AM radio transmitter radiates some power at a given frequency. How many photons per second does the emitter emit?
  23. If the brightness of a beam of light is increased, the ________ of the _____________ will also increase.
  24. Determine the wavelength of the third Balmer line (transition from n = 5 to n = 2 ).
  25. Find the wavelength of a golf ball.
  26. Given an electron’s wavelength, what is its speed?

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Physics 132: What is an Electron? What is Light? by Roger Hinrichs, Paul Peter Urone, Paul Flowers, Edward J. Neth, William R. Robinson, Klaus Theopold, Richard Langley, Julianne Zedalis, John Eggebrecht, and E.F. Redish is licensed under a Creative Commons Attribution 4.0 International License, except where otherwise noted.

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