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Author Question: Certain planes of a crystal of halite have a spacing of 0.399 nm. The crystal is irradiated by a ... (Read 110 times)

D2AR0N

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on: Jul 29, 2018
Certain planes of a crystal of halite have a spacing of 0.399 nm. The crystal is irradiated by a beam of x-rays. First order constructive interference occurs when the beam makes an angle of 20 with the planes of the crystal surface.
 
  What is the wavelength of the x-rays?
  A) 0.24 nm B) 0.27 nm C) 0.17 nm D) 0.14 nm E) 0.21 nm

Question 2

An object is oscillating on a spring with a period of 4.60 s. At time t = 0.00 s the object has zero speed and is at x = 8.30 cm. What is the acceleration of the object at t = 2.50 s?
 
  A) 1.33 cm/s2
  B) 0.784 cm/s2
  C) 11.5 cm/s2
  D) 14.9 cm/s2
  E) 0.00 cm/s2
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dajones82

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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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D2AR0N

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Reply #2 on: Jul 29, 2018
Thanks


dajones82

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Reply #3 on: Jul 29, 2018
Welcome :)


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