You drop a stone down a well that is 9.5 m deep. How long is it ...

[TFauchery]

You drop a stone down a well that is 9.5 m deep. How long is it before you hear the splash? The speed of sound in air is 343 m/s and air resistance is negligible.
 
  A) 1.2 s B) 1.4 s C) 1.3 s D) 1.6 s E) 1.5 s

Question 2

According to the theory of cosmic inflation, during a brief early inflationary period, the universe
 
  A) expanded at lightspeed.
  B) expanded at a speed that exceeded lightspeed.
  C) expanded at a speed that was only slightly slower than lightspeed.
  D) quickly became far more densely filled with matter.
  E) quickly became far more densely filled with energy.

[LVPMS]

Answer to Question 1

B

Answer to Question 2

B

[TFauchery]

TYSM

[Jsherida]

Excellent