Question 10
Ultrasonic wave propagates at 1480 m/s. One of the benefits from ultrasonic waves is to measure the depth of the sea by using the reflectance properties.
a. (1 point) What is the frequency of the wave if the ultrasonic wavelength is 0.04m?
b. (1 point) How much time does ultrasonic wave take to measure ocean depth 3330 m?
c. (2 point) The table below records time required by ultrasonic wave to propagate from transmitter to the sea floor and back again to the transmitter.
| Location | A | B | C | D | E | F | G | H |
| --- | --- | --- | --- | --- | --- | --- | --- | --- |
| Time (s) | 1 | 2 | 2,5 | 5 | 3 | 6 | 4 | 2 |
Draw an underwater surface based on the data
a. (1 point) What is the frequency of the wave if the ultrasonic wavelength is 0.04m?
b. (1 point) How much time does ultrasonic wave take to measure ocean depth 3330 m?
c. (2 point) The table below records time required by ultrasonic wave to propagate from transmitter to the sea floor and back again to the transmitter.
| Location | A | B | C | D | E | F | G | H |
| --- | --- | --- | --- | --- | --- | --- | --- | --- |
| Time (s) | 1 | 2 | 2,5 | 5 | 3 | 6 | 4 | 2 |
Draw an underwater surface based on the data