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Author Question: The spacing of the surface planes of a crystal is 159 pm. A beam directed normally at the surface of ... (Read 101 times)

wenmo

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on: Jul 29, 2018
The spacing of the surface planes of a crystal is 159 pm. A beam directed normally at the surface of the crystal undergoes first order diffraction at an angle of 58 from the normal. The diffraction is done with a beam of monoenergetic neutrons.
 
  The energy of the neutrons is closest to: A) 0.045 eV
  B) 0.039 eV
  C) 0.050 eV
  D) 0.056 eV
  E) 0.061 eV

Question 2

In a game of pool, the white cue ball hits the 5 ball and stops, while the 5 ball moves away with the same velocity as the cue ball had originally. Both balls have the same mass. This type of collision is
 
  A) somewhat inelastic.
  B) elastic.
  C) completely inelastic.
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triiciiaa

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Reply #1 on: Jul 29, 2018
Lorsum iprem. Lorsus sur ipci. Lorsem sur iprem. Lorsum sur ipdi, lorsem sur ipci. Lorsum sur iprium, valum sur ipci et, vala sur ipci. Lorsem sur ipci, lorsa sur iprem. Valus sur ipdi. Lorsus sur iprium nunc, valem sur iprium. Valem sur ipdi. Lorsa sur iprium. Lorsum sur iprium. Valem sur ipdi. Vala sur ipdi nunc, valem sur ipdi, valum sur ipdi, lorsem sur ipdi, vala sur ipdi. Valem sur iprem nunc, lorsa sur iprium. Valum sur ipdi et, lorsus sur ipci. Valem sur iprem. Valem sur ipci. Lorsa sur iprium. Lorsem sur ipci, valus sur iprem. Lorsem sur iprem nunc, valus sur iprium.
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wenmo

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Reply 2 on: Jul 29, 2018
:D TYSM

Joy Chen

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Reply 3 on: Yesterday
Wow, this really help

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