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Author Question: A 10-kg mass, hung by an ideal spring, causes the spring to stretch 2.0 cm. What is the spring ... (Read 89 times)

SO00

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on: Jul 29, 2018
A 10-kg mass, hung by an ideal spring, causes the spring to stretch 2.0 cm. What is the spring constant (force constant) for this spring?
 
  A) 5.0 N/cm
  B) 49 N/cm
  C) 0.20 N/cm
  D) 20 N/m
  E) 0.0020 N/cm

Question 2

The image formed by a single concave lens
 
  A) is always real.
  B) is always virtual.
  C) could be real or virtual, depending on whether the object distance is smaller or greater than the focal length.
  D) could be real or virtual, but is always real when the object is placed at the focal point.
  E) is always inverted.


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Dominic

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

B

Answer to Question 2

B


SO00

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Reply 2 on: Jul 29, 2018
Wow, this really help

diana chang

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Reply 3 on: Yesterday
Great answer, keep it coming :)

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