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Home Q & A Board Science-Related Homework Help Physics
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miguelb80 miguelb80
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6 years ago
When you increase only the frequency of the incoming light onto the emitter, you measure
  A. An increased current
  B. A decrease in the necessary stopping voltage
  C. An increase in the necessary stopping voltage
  D. No change in either current or stopping voltage
  E. Either a or c. You cannot determine which from the information given.


[Ques. 2] When you increase only the intensity of the light onto the emitter, you measure
 
A. A decrease in the necessary stopping voltage
  B. An increase in the necessary stopping voltage
  C. No change in either current or stopping voltage
  D. Either a or c. You cannot determine which from the information given.
  E. An increased current



[Ques. 3] How did Planck modify the classical theory of blackbody radiation to correctly determine his radiation law?
 
A.He found that the blackbody model was incorrect for purposes of theory
  B.He accepted the Stefan-Boltzmann law
  C. He assumed light was absorbed and emitted in quanta
  D.He realized that the charge of the electron was not quantized
  E.He proved the necessity of relativistic considerations



[Ques. 4] The Rydberg equation is used to
 
a.determine the ratio of the electron charge to its mass
  b. calculate the wavelengths of different spectral lines of hydrogen
  c. measure the mass of the hydrogen atom
  d. calculate the wavelengths of different transitions in energy level of electrons in helium



[Ques. 5] Who first accurately measured the value for the charge of the electron?
 
A. Rntgen
  B. Thomson
  C. Planck
  D. Millikan
  E. Einstein



[Ques. 6] When relating the linear momentum and total energy of an object with speed v = 0.8c, which of the following changes would increase the energy by the greatest amount? Assume that it is possible to change the mass of the object.
 
A. increase the momentum of the object to 2p while keeping the mass constant.
  B. increase the mass of the object to 2m while keeping the momentum constant.
  C. imagine the speed of light to change to 82 of its present value (the object is still at initial speed v).
  D. increase the momentum of the object to 2p while keeping the velocity constant.
  E. increase the speed of the object to 0.95c.



[Ques. 7] The addition of velocities formula restricts the values of certain velocities due to all of the following EXCEPT:
 
A. The curvature of spacetime consistent with inertial frames.
  B. Lorentz transformations.
  C. The speed of light in a vacuum is the same to all observers.
  D. The laws of physics are the same in all inertial frames.



[Ques. 8] The relativistic factor ( used in conjunction with the Lorentz transformation provides that
 
A.an object of length L measured in a frame at rest is measured to be L when that object is moving with respect to the rest frame.
  B.if two frames are aligned at t = t' = 0 but the 'primed' frame moves at some constant velocity, an interval of time t in the rest frame will be measured as a time t/ in the moving frame.
  C.increased velocities decrease the value of
  D.a particle moving faster than the speed of light gives an imaginary relativistic factor.



[Ques. 9] Samus is exploring the planet Zebes in the star system Metroid Prime (where the laws of physics are the same as on Earth and in our universe) in a ship moving at constant velocity. She turns on her headlamps as she encounters some strange fog. Ridley, the villain lying in wait, is at rest with respect to Samus. The speed of the light from Samus's headlamps as measured by Ridley depends most importantly on
 
the speed of Samus's ship
  the speed of light in the fog
  the speed of Samus with respect to the ether
  the total addition of speeds of Samus's ship, the planet Zebes, and the system Metroid Prime
  the speed of light in a vacuum



[Ques. 10] Jack and Jill are fiercely competitive siblings, and since they were born exactly a year apart, can compete in most everything. Jill, the younger, always resented her older brother for being just that: older. When they got older, Jack resented Jill's youthful advantage of one year. Imagine that Jack builds himself a high- tech spaceship and races off into space, knowing that he can at least slow down his aging. If he were gone for one year according to Jill, which of the following statements could be or are true?
 
II, IV
  I, III, IV
  I, IV
  I, III, V
  II, V
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MelisaericksonMelisaerickson
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6 years ago
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4 years ago
thanks
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