Jennifer is inside her windowless space station laboratory and ...

[DelorasTo]

Jennifer is inside her windowless space station laboratory and finds herself increasingly pulled to the floor. What experiment can she perform inside the lab to decide if she is feeling the effect of an acceleration or an effect of gravity?
 
  What will be an ideal response?

Question 2

Substance A has a density of 3 g/cm3 and substance B has a density of 4 g/cm3. In order to obtain equal masses of these two substances, the ratio of the volume of A to the volume of B will be equal to
 
  A) 1 : 4
  B) 4 : 3
  C) 3 : 4
  D) : 1
  E) 1 : 3

[Jordin Calloway]

Answer to Question 1

None. The Equivalence Principle says no experiment performed in a closed system can distinguish between the two effects.

Answer to Question 2

B