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  1. J

    Thin Film Interference- Transmission

    Homework Statement A thin layer of water (n=1.33) is surrounded by air what wavelength of light will not be transmitted through the water at the point where the water is 113 nm thick? The Attempt at a Solution - In phase - Path difference of 2T. - Constructive Interference I just...
  2. J

    Relativistic Velocity Transformations

    A quasar is moving away from the earth with a speed of 0.850C. It emits a proton that eventually reaches earth, and is travelling at a speed of 0.519C relative to the earth. How fast is the proton moving relative to the quasar? Is this answer as simple as it seems? is the answer simply...
  3. J

    Basic relativity question (probably easy for everyone on here xD)

    Homework Statement a quasar is moving away from earth with a speed 0f 0.850c. It emits a proton that eventually reaches earth with a speed of 0.519c relative to the earth. How fast is the proton moving relative to the QUASAR. The Attempt at a Solution u = u' + v / 1 + u'(v) / c^2 u...
  4. J

    Describe Millikan's Oil Drop Experiment!

    How did he determine the mass of an oil drop and the charge of the electron?
  5. J

    How do i find common factors?

    3.5, 5.4, 8.2, 8.9, 13.6, 14.7, 17.1 22.9, 28.3, 31.8. is there any easier way then by hand :\ thanks for any help
  6. J

    Finding mass of a single screw lab! No calculations XD

    I have been given the masses of 5 cups, each with a different amount of screws inside. I am asked to find the mass of a single screw. The cups themselves are all equal in mass and the screws are all equal in mass as well. I subtracted all the cups from eachother to get a bunch of numbers...
  7. J

    Finding the mass of a screw lab.

    I have been given the masses of 5 cups, each with a different amount of screws inside. I am asked to find the mass of a single screw. The cups themselves are all equal in mass and the screws are all equal in mass as well. I know you are supposed to subtract the cups from each other to...
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