13
QuizMultiple Choice
Unit Test
Question 13 of 15 • Physics B Spring 2026 Mr Edge
A boy yells in a narrow valley. The sound reflects off of a boulder that is 80 m away. How long will it take to hear the echo if the speed of a sound wave is 320 m/s?(speed = )
Answer
A
0.25 seconds for the sound to reach the boulderB
0.50 seconds for the sound to travel to the boulder and return as an echoC
2.0 seconds for the sound to continue traveling beyond the boulderD
4.0 seconds for the sound to travel back and forth multiple times