Most of the craters on the highlands of the Moon were formed ...

[ericka1]

Most of the craters on the highlands of the Moon were formed
 
  A) approximately 65 million years ago
  B) at the end of the Hadean eon approximately 3.85 billion years ago
  C) fairly recently during the last million years or so
  D) during the period of early bombardment constituting the first few hundred million years of the Earth's history

Question 2

A string, fixed at both ends, vibrates at a frequency of 12 Hz with a standing transverse wave pattern containing 3 loops. What frequency is needed if the standing wave pattern is to contain 4 loops?
 
  A) 48 Hz
  B) 36 Hz
  C) 16 Hz
  D) 12 Hz
  E) 18 Hz

[diana chang]

Answer to Question 1

D

Answer to Question 2

C

[ericka1]

Thanks for the timely response, appreciate it

[aliotak]

Excellent