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Author Question: A lens of focal length 45 mm is used as a magnifier. The object being viewed is 6.8 mm long, and is ... (Read 70 times)

kellyjaisingh

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on: Jul 29, 2018
A lens of focal length 45 mm is used as a magnifier. The object being viewed is 6.8 mm long, and is positioned at the focal point of the lens. The lens is moved closer to the object, so that the image is now 25 cm from the lens.
 
  The distance the lens has been moved, in cm, is closest to: A) 0.69
  B) 0.76
  C) 0.62
  D) 0.55
  E) 0.48

Question 2

How many significant figures are in the number 120.070?
 
  A) six
  B) five
  C) four
  D) three
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angrybirds13579

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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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kellyjaisingh

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

alvinum

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Reply 3 on: Yesterday
Excellent

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