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Author Question: A double convex lens has faces with radii of magnitudes 18.0 cm and 20.0 cm. When an object is ... (Read 75 times)

lb_gilbert

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on: Jul 29, 2018
A double convex lens has faces with radii of magnitudes 18.0 cm and 20.0 cm. When an object is placed 24.0 cm in front of the lens, a real image is formed 32.0 cm from the lens.
 
  (a) What is the focal length of this lens?
  (b) What is the index of refraction of the material from which the lens is made?

Question 2

A 40.0-g block of ice at -15.00C is dropped into a calorimeter (of negligible heat capacity) containing water at 15.00C.
 
  When equilibrium is reached, the final temperature is 8.00C. How much water did the calorimeter contain initially? The specific heat of ice is 2090 J/kg  K, that of water is 4186 J/kg  K, and the latent heat of fusion of water is 33.5  104 J/kg.
  A) 546 g B) 405 g C) 345 g D) 302 g E) 634 g
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peilian

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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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lb_gilbert

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Reply 2 on: Jul 29, 2018
Excellent

dyrone

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

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