Author Question: A car is approaching a radio station at a speed of 25.0 m/s. If the radio station broadcasts at a ... (Read 133 times)

cartlidgeashley · **on:** Jul 29, 2018

A car is approaching a radio station at a speed of 25.0 m/s. If the radio station broadcasts at a frequency of 74.5 MHz, what change in frequency does the driver observe?

A) 98.3 Hz
B) 6.21 Hz
C) 726 Hz
D) 67.0 Hz
E) 64.5 Hz

Question 2

Two people are talking at a distance of 3.0 m from where you are and you measure the sound intensity as 1.1 10-7 W/m2. Another student is 4.0 m away from the talkers. What sound intensity does the other student measure?

A) 6.2 10-8 W/m2
B) 1.5 10-7 W/m2
C) 8.3 10-8 W/m2
D) 7.8 10-7 W/m2
E) 2.5 10-8 W/m2