Question

an oceanic vessel surveys the ocean floor using ultrasonic waves. the ocean beneath the boat is 4600 meters deep. if the ultrasonic wave travels to the bottom of the ocean and back to the boat in 6 seconds, what is its average speed? a 770 m/s b 1530 m/s c 7700 m/s d 27600 m/s

Explanation:

Step1: Calculate total distance

The wave travels to the bottom and back. So the total distance $d$ is $2\times4600$ meters. $d = 2\times4600=9200$ m.

Step2: Use speed - formula

The speed formula is $v=\frac{d}{t}$, where $t = 6$ s and $d = 9200$ m. So $v=\frac{9200}{6}\approx1533.33$ m/s. The closest value is 1530 m/s.

Answer:

B. 1530 m/s