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Author Question: If we increase the brightness of violet light shining on a photosensitive surface we also increases ... (Read 69 times)

melina_rosy

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on: Jul 29, 2018
If we increase the brightness of violet light shining on a photosensitive surface we also increases the
 
  A) number of electrons ejected per second.
  B) kinetic energy of the ejected electrons.
  C) threshold frequency.
  D) time lag between the absorption of blue light and ejection of electrons.
  E) none of the above

Question 2

A 400-g piece of metal at 120C is dropped into a cup containing 450 g of water at 15.0C. The final temperature of the system is 40.0C. What is the specific heat of the metal, assuming no heat is exchanged with the surroundings or the cup?
 
  A) 1470 J/(kgK)
  B) 2830 J/(kgK)
  C) 3420 J/(kgK)
  D) 3780 J/(kgK)
  E) 4280 J/(kgK)


carolinefletcherr

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Reply #1 on: Jul 29, 2018
Answer to Question 1

Answer: A

Answer to Question 2

A


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