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Author Question: The angular magnification of a refracting telescope is 40. When the object and final image are both ... (Read 39 times)

Beheh

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on: Jul 29, 2018
The angular magnification of a refracting telescope is 40. When the object and final image are both at infinity, the distance between the eyepiece and the objective is 143.5 cm. The telescope is used to view a distant radio tower.
 
  The real image of the tower, formed by the objective, is 6.0 mm in height. The focal point of the eyepiece is positioned at the real image. What is the focal length of the objective lens?
  A) 139 cm B) 141 cm C) 140 cm D) 138 cm

Question 2

A simple pendulum and a mass oscillating on an ideal spring both have period T in an elevator at rest. If the elevator now accelerates downward uniformly at 2 m/s2, what is true about the periods of these two systems?
 
  A) Both periods would remain the same.
  B) Both periods would increase.
  C) Both periods would decrease.
  D) The period of the pendulum would increase but the period of the spring would stay the same.
  E) The period of the pendulum would decrease but the period of the spring would stay the same.
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GCabra

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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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Beheh

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Reply 2 on: Jul 29, 2018
Excellent

xiazhe

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Reply 3 on: Yesterday
Wow, this really help

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