Recent content by jayjay713

  1. J

    Thin Film Interference- Transmission

    yes! The answer is 601 nm. If you take the wavelength and times it by the index of refraction of water (1.33), you get 150.29. Multiply that by 4 and get ~601 nm. Don't know how that fits into the formula of 2T = wavelength / something (in example its over 4 or 2, don't know how to get that...
  2. 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...
  3. J

    Relativistic Velocity Transformations

    but if I used that formula, wouldn't it give me a speed relative to the earth? Or would it be relative to the quasar? :O
  4. 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...
  5. J

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

    i don't know what it means? it's on the formula sheet there is an example using it. all i want to know is the speed of the proton relative to the quasar... QUASAR<-0.85c-<QUASAR "shoots" PROTON>0.519>PROTON <EARTH> the velocities are relative to earth. THERE! I DREW IT OUT :) Does...
  6. J

    Relativity and Time Dilation

    it's his stinkin isu for grade 12 physics. we are given a booklet with a few examples but its really complicated stuff.
  7. J

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

    A quasar is moving AWAY from the earth with a speed of 0.850C. Itemits a proton that eventually reaches the earth, and is travelling at a speed of 0.519C relative to the EARTH. how fast is the proton moving RELATIVE to the QUASAR? my attempt: u = u' +v / (1 + u'v/c^2) u = 0.578c RELATIVE to...
  8. 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...
  9. J

    Relativistic velocity transformations

    oh okay. so b would be equal to 1 as well because of the postulate. thank you for your help!
  10. J

    Describe Millikan's Oil Drop Experiment!

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

    Finding mass of a single screw lab! No calculations XD

    0.1 is the sweet spot. It is very similar to the oil drip experiment!
  12. J

    Finding mass of a single screw lab! No calculations XD

    3.5 1.9 0.9 5.4 2.8 -2.1 8.2 0.7 8.9 see what I mean? absolute value algorithm ends with 0.6 0.6 how do i finish it and get the mass? is 0.6 grams the mass?:S
  13. J

    Finding mass of a single screw lab! No calculations XD

    Interesting that you say it reminds you of Millikan's oil drip experiment. How so?
  14. J

    Finding mass of a single screw lab! No calculations XD

    YIIIIIIIIIIP i did it without the negatives and i got 0.9, 0.3, 0.9 .. which equals 0.6, 0.6. BUT if i use negatives for the last step it would be 0.6 - (-0.6) = 1.2 g! is that a good guess? or should i stick with 0.6?
  15. J

    Finding mass of a single screw lab! No calculations XD

    i got -198.8! in the 10th difference haha what... i did it on excel as well, same answer! what am i doing wrong?
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