If I walk 8.0 meters in a straight line and then walk 5.0 meters in another straight line, the total ...

If I walk 8.0 meters in a straight line and then walk 5.0 meters in another straight line, the total displacement cannot have a magnitude of
 
  A) 8. m.
  B) 13. m.
  C) 3. m.
  D) 5. m.
  E) 2. m.

Question 2

White dwarfs
 
  A) are dead stars
  B) are in the process of forming
  C) are mature stars that are fusing hydrogen into helium in their cores
  D) have exhausted their nuclear fuel and are in the process of dying

Question 3

What is the sum of 1123 and 10.3 written with the correct number of significant figures?
 
  A) 1.13  103
  B) 1133.3000
  C) 1.1  103
  D) 1133.3
  E) 1133

Question 4

You blow on food to cool it. Blowing increases
 
  A) conduction.
  B) convection.
  C) radiation.
  D) the specific heat.
  E) the latent heat.

Question 5

In music the 3rd harmonic is which overtone?
 
  A) 4th
  B) 2nd
  C) 1st
  D) 3rd
  E) 5th