The Challenger Deep has previously been measured to have a depth ...

[Engineer]

The Challenger Deep has previously been measured to have a depth of 10,994 meters. You have been sent to the part of the Pacific Ocean to verify this depth with an echo sounder.
 
  Assuming that Depth = 1/2 (1,500 m/sececho travel time), approximately how many seconds should it take for the sound wave to leave your ship, strike the bottom of the Challenger Deep, and return if the depth is correct?
  A) 10.5 seconds
  B) 14.66 seconds
  C) 17.39 seconds
  D) 22.67 seconds

Question 2

The measurement of ocean depth and the topography of the ocean floor are known as ________. A) geophysics
 
  A) geophysics
  B) seismic tomography
  C) topographic surveying
  D) bathymetry

[enass]

Answer to Question 1

Answer: B

Answer to Question 2

Answer: D

[Engineer]

Excellent

[jamesnevil303]

Gracias!