PIRA: 6A40.30


 Lab Equipment  Directions
  1.  2 nalgene containers with lids and balls
  2. 1 nalgene container with lid
  3. vegetable oil
  4. pyrex tube
  5. steel ball
  1.  View and compare the 3 tanks in a dimly lit area or from a distance. Too much light reveals a slight mismatch of the index of oil and glass.
  2. Notice one ball is hanging from teh bottom, one from the top and one not hanging at all. Why?