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Author Question: Stromatolites date back to approximately A) 4.6 billion years ago B) 3.5 billion years ago C) ... (Read 137 times)

eruditmonkey@yahoo.com

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on: Jul 27, 2018
Stromatolites date back to approximately
 
  A) 4.6 billion years ago
  B) 3.5 billion years ago
  C) 3.85 billion years ago
  D) 4.0 billion years ago

Question 2

An up quark (u) has a charge +2/3, and a down quark (d) has a charge of -1/3. Which of the following describes a proton?
 
  A) uuu
  B) uud
  C) udd
  D) ddd


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AmberC1996

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

B

Answer to Question 2

B


eruditmonkey@yahoo.com

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Reply 2 on: Jul 27, 2018
Gracias!

milbourne11

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Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

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