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Author Question: In order for a substance to sustain a fission chain reaction, one important condition is that A) ... (Read 69 times)

clmills979

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on: Jul 29, 2018
In order for a substance to sustain a fission chain reaction, one important condition is that
 
  A) each fissioning nucleus must release a sufficient number of neutrons.
  B) the nuclei must collide with enough energy to overcome the electrical repulsion between them.
  C) each fissioning nucleus must release a sufficient number of alpha-particles.
  D) energy must be continually supplied from the outside.
  E) the nuclei must stay in shape by maintaining a regular jogging program.

Question 2

When an object 1.15 cm tall is placed 12 cm from a lens, the lens produces an upright image of the object that is 5.75 cm tall. What is the focal length of the lens?
 
  A) 24 cm
  B) 18 cm
  C) 60 cm
  D) 15 cm
  E) 9.0 cm


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medine

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

A

Answer to Question 2

D


clmills979

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Reply #2 on: Jul 29, 2018
Both answers were spot on, thank you once again


medine

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Reply #3 on: Jul 29, 2018
Great! Please up vote :D


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