High temperatures are required to get H nuclei to fuse because ...

[Kikoku]

High temperatures are required to get H nuclei to fuse because they ________ one another because of their ________ electric charges.
 
  a. attract; negative
  b. attract; positive
  c. repel; negative
  d. repel; positive

Question 2

One body weighs twice as much as another on a seesaw, as such the center of mass is located
 
  a. in the center of the seesaw. b. towards the less massive body.
  c. towards the more massive body. d. at the heaviest body.

[scrocafella]

Answer to Question 1

d

Answer to Question 2

c

[Kikoku]

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[scrocafella]

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