A car's horn is honking at a constant frequency. as the car is driving away from you the pitch you hear will be what is heard by the driver of the car A. lower than
B. higher than
C. the same as
D. exactly twice

How does the electric potential energy between two charged particles change if one particle is reduced by a factor of 3? a. increased by a factor of 3 b. it is decreased by a factor of 9 c. it is reduced by a factor of 3 d. it is increased by a factor of 9