An object of mass m sits on a flat table. The Earth pulls on this ...

[NClaborn]

An object of mass m sits on a flat table. The Earth pulls on this object with force mg, which we will call the action force. What is the reaction force?
 
  A)
 
  The table pushing up on the object with force mg.
  B)
 
  The object pushing down on the table with force mg.
  C)
 
  The table pushing down on the floor with force mg.
  D)
 
  The object pulling upward on the Earth with force mg.
  E)
 
  The table pulling upward on the Earth with force mg.

Question 2

Sources are coherent if
 
  A)
 
  the distance to them is the same.
  B)
 
  they do not come from lasers.
  C)
 
  they have a zero phase difference.
  D)
 
  they have a constant phase difference.
  E)
 
  they only come from lasers.

[janeli1]

Answer to Question 1

D

Answer to Question 2

D

[NClaborn]

TY

[janeli1]

You're welcome