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Author Question: A nonrelativistic electron has a kinetic energy of 5.4 eV. What is the energy of a photon whose ... (Read 146 times)

Haya94

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on: Jul 29, 2018
A nonrelativistic electron has a kinetic energy of 5.4 eV. What is the energy of a photon whose wavelength is the same as the de Broglie wavelength of the electron? (mel = 9.11  10-31 kg, c = 3.00  108 m/s, 1 eV = 1.60  10-19 J)
 
  A) 2.0 keV B) 2.7 keV C) 2.5 keV D) 2.2 keV E) 2.4 keV

Question 2

Two identical objects are placed in a room with a temperature of 20C. Object A has a temperature of 50C, while object B has a temperature of 90C. What is the ratio of the net power emitted by object B to the power emitted by object A?
 
  A) 21 B) 1.7 C) 81 D) 2.8 E) 17
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laurnthompson

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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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Haya94

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Reply 2 on: Jul 29, 2018
Excellent

olderstudent

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Reply 3 on: Yesterday
:D TYSM

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