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Author Question: In air a concave mirror has a focal length of 30. cm. Under water that same mirror would have ... (Read 37 times)

Zoey63294

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on: Jul 27, 2018
In air a concave mirror has a focal length of 30. cm. Under water that same mirror would have ________ focal length.
 
  A) a larger
  B) the same
  C) a smaller

Question 2

A parallel plate capacitor with plate separation of 4.0 cm has a plate area of 4.0  10-2 . What is the capacitance of this capacitor with air between these plates?
 
  A) 8.9  10-11 F
  B) 8.9  10-12 F
  C) 8.9  10-13 F
  D) 8.9  10-14 F
  E) 8.9  10-15 F


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raili21

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

B

Answer to Question 2

B


Zoey63294

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Reply 2 on: Jul 27, 2018
Wow, this really help

cdmart10

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Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

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