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Author Question: An object is placed 40 cm in front of a lens of focal length 40 cm. A second lens is placed 17 cm ... (Read 160 times)

michelleunicorn

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on: Jul 29, 2018
An object is placed 40 cm in front of a lens of focal length 40 cm. A second lens is placed 17 cm beyond the first. An image forms 48 cm past the second lens. The lateral magnification of this system is
 
  A)
 
  -2.8.
  B)
 
  -1.2.
  C)
 
  1.2.
  D)
 
  2.8.
  E)
 
  impossible to determine with the information given.

Question 2

Calculate the entropy change of the lead that occurs when 2.00 kg of lead at 40.0C are placed in a very large quantity of water at 10.0C. The specific heat of lead is 0.031 cal/(gK).
 
  A)
 
  -12.6 J/K
 
  B)
 
  86.0 J/K
 
  C)
 
  -26.1 J/K
 
  D)
 
  -86.0 J/K
 
  E)
 
  -6.24 J/K


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srodz

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Reply #1 on: Jul 29, 2018
Answer to Question 1

B

Answer to Question 2

C


michelleunicorn

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Reply #2 on: Jul 29, 2018
Thanks


srodz

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Reply #3 on: Jul 29, 2018
Welcome :)


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