Warm-Up Exercise 18

Due 12:15 pm, Mon 8 Oct 2012

Physics 123, Fall 2012

Reading assignment: 17.3,17.4

If the "sound level" of a noise changes by 20 dB, by how much did the intensity change?

Section 17.4 discusses both the Doppler effect and shock waves. How/why are they related? Hint: compare Fig. 17.10 to Fig. 17.11