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Author Question: If the work function of a metal surface is 2.20 eV, what frequency of incident light would give a ... (Read 118 times)

sc00by25

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on: Jul 29, 2018
If the work function of a metal surface is 2.20 eV, what frequency of incident light would give a maximum kinetic energy of 0.25 eV to the photoelectrons ejected from this surface? (1 eV = 1.60  10-19 J, h = 6.626  10-34 J  s)
 
  A) 2.50  1014 Hz
  B) 3.53  1014 Hz
  C) 5.92  1014 Hz
  D) 2.05  1014 Hz
  E) 1.02  1014 Hz

Question 2

A 6.0-F air-filled capacitor is connected across a 100-V potential source (a battery). After the battery fully charges the capacitor, it is left connected and the capacitor is immersed in transformer oil, which has a dielectric constant of 4.5.
 
  How much additional charge flows from the battery onto the capacitor during this process?
  A) 1.2 mC B) 2.1 mC C) 2.5 mC D) 1.7 mC
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ecox1012

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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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sc00by25

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Reply 2 on: Jul 29, 2018
Great answer, keep it coming :)

xiazhe

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Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

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