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Author Question: The focal lengths of the objective and eyepiece in a compound microscope are 0.8 cm and 2.5 cm, ... (Read 94 times)

kaid0807

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on: Jul 27, 2018
The focal lengths of the objective and eyepiece in a compound microscope are 0.8 cm and 2.5 cm, respectively. The image formed by the objective is 16 cm from it and the final image is 25 cm from the eye. What is the total magnification?
 
  A) -19.0
  B) -11.0
  C) -2.0
  D) -100
  E) -200

Question 2

Consider a bicycle wheel to be a ring of radius 30. cm and mass 1.5 kg. Neglect the mass of the axle and sprocket.
 
  If a force of 20. N is applied tangentially to a sprocket of radius 4.0 cm for 4.0 s, what linear speed does the wheel achieve, assuming it rolls without slipping?


sultana.d

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Reply #1 on: Jul 27, 2018
Answer to Question 1

E

Answer to Question 2

7.11 m/s


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kaid0807

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Reply #2 on: Jul 27, 2018
Both answers were spot on, thank you once again


sultana.d

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Reply #3 on: Jul 27, 2018
Great! Please up vote :D


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