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Author Question: What happens when a particle and its corresponding particle of antimatter meet? A) No one knows, ... (Read 62 times)

segrsyd

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on: Jul 27, 2018
What happens when a particle and its corresponding particle of antimatter meet?
 
  A) No one knows, since antimatter is only theoretical and not known to really exist.
  B) The particles join together to make an antimatter atom.
  C) The particles collide and then bounce back apart.
  D) The particle and the antiparticle are annihilated, turning all their mass into energy.
  E) They live happily ever after.

Question 2

Microfossil evidence suggests that life
 
  A) originated when the Earth formed 4.6 billion years ago
  B) originated about 3.4 billion years ago
  C) existed 3.85 billion years ago
  D) existed and was well established by 3.4 to 3.5 billion years ago


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smrtceo

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Reply #1 on: Jul 27, 2018
Answer to Question 1

D

Answer to Question 2

D


segrsyd

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Reply 2 on: Jul 27, 2018
Gracias!

xiaomengxian

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Reply 3 on: Yesterday
Excellent

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