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Author Question: A convex spherical mirror with a radius of 50 cm has a 4.0 cm tall object placed 100 cm in front of ... (Read 30 times)

ETearle

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on: Jul 29, 2018
A convex spherical mirror with a radius of 50 cm has a 4.0 cm tall object placed 100 cm in front of it. What is the position of the image relative to the mirror?
 
  A) 25 cm behind the mirror
  B) 20 cm behind the mirror
  C) 25 cm in front of the mirror
  D) 100 cm in front of the mirror
  E) 20 cm in front of the mirror

Question 2

A wire of resistivity  must be replaced in a circuit by a wire of the same material but four times as long. If, however, the total resistance is to remain as before, the diameter of the new wire must
 
  A) be two times the original diameter.
  B) be the same as the original diameter.
  C) be one-fourth the original diameter.
  D) be one-half the original diameter.
  E) be four times the original diameter.


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ilianabrrr

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

B

Answer to Question 2

A


ETearle

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Reply 2 on: Jul 29, 2018
Excellent

nathang24

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

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