The critical mass of a fissionable substance is the ________. ...

[rlane42]

The critical mass of a fissionable substance is the ________.
 
  A) minimum amount required for a self-sustaining chain reaction
  B) minimum amount required for radioactive decay
  C) maximum amount that will detonate when separated into subcritical pieces
  D) maximum amount needed to make a nuclear power plant operate sustainably

Question 2

Convert 250.0 kcal to Joules.
 
  A) 250.0 J
  B) 5.975  104 J
  C) 1.046  106 J
  D) 1.046  103 J

[Galvarado142]

Answer to Question 1

A

Answer to Question 2

C

[rlane42]

Thank you!

[Galvarado142]

Always glad to help...