Q: Ultrasonic distance detectors emit an ultrasonic frequency that bounces off of the opposing object and is picked up by the detector. The longer it takes for the sound to come back, the farther away it is. If the time between the sound emission and detection is 30 milliseconds, how far away is the object being measured? Note: assume the speed of sound is 350 m/s.
A		5 m
B		10 m
C		50 m
D		100 m

Kinematics | Sound | Quantitative Skills |