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Author Question: How slow must a 200-g ball move to have a de Broglie wavelength of 1.0 mm? (h = 6.626 10-34 J s) ... (Read 12 times)

sjones

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on: Jul 29, 2018
How slow must a 200-g ball move to have a de Broglie wavelength of 1.0 mm? (h = 6.626  10-34 J  s)
 
  What will be an ideal response?

Question 2

In an electroplating process, copper (ionic charge +2e, atomic weight 63.6 g/mol) is deposited using a current of 10.0 A. What mass of copper is deposited in 10.0 minutes? Avogadro's number is 6.022  1023 molecules/mol and e = 1.60  10-19 C.
 
  A) 3.96 g B) 1.98 g C) 0.99 g D) 2.52 g E) 2.53 g


jackie

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

3.3  10-30 m/s

Answer to Question 2

B


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sjones

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Reply #2 on: Jul 29, 2018
Both answers were spot on, thank you once again


jackie

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Reply #3 on: Jul 29, 2018
Great! Please up vote :D


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