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Author Question: Radio astronomers often study the radiation emitted by a hydrogen atom from a transition between the ... (Read 47 times)

tiara099

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on: Jul 29, 2018
Radio astronomers often study the radiation emitted by a hydrogen atom from a transition between the two hyperfine levels associated with the ground state. This radiation has a wavelength of 21 cm.
 
  What is the energy difference between the hyperfine levels? (1 eV = 1.60  10-19 J) A) 5.9  10-6 eV
  B) 5.9  10-25 J
  C) 1.7  10-24 J
  D) 4.7  10-25 J

Question 2

A proton, with mass 1.67  10-27 kg and charge +1.6  10-19 C, is sent with velocity 7.1  104 m/s in the +x direction into a region where there is a uniform electric field of magnitude 730 V/m in the +y direction.
 
  What are the magnitude and direction of the uniform magnetic field in the region, if the proton is to pass through undeflected? Assume that the magnetic field has no x-component and neglect gravitational effects.
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komodo7

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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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tiara099

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Reply 2 on: Jul 29, 2018
Excellent

Alyson.hiatt@yahoo.com

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Reply 3 on: Yesterday
Wow, this really help

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