Echoes and sonar - Double award - CCEA test questions - CCEA Double Award

1

What type of wave is sound?

2

Through which of the following can sound not travel?

3

What is the approximate speed of sound in air?

4

Which of the following best describes a sound wave with high amplitude?

5

What is the range of normal human hearing?

6

What is ultrasound?

7

Which of these is not a use of ultrasound?

8

A sonar system on a boat sends an ultrasound pulse towards the seabed. The pulse is reflected, and it is detected 0.2 s later by the system. Calculate the depth of water if the speed of sound in water is 1 480 m/s.

9

A carpet salesperson uses an ultrasonic device to measure the length of a room. The device shows that the distance from one wall to the opposite wall is 6.5 m. If the speed of ultrasound in air is 340 m/s, how long does it take for the ultrasound to travel to the far wall and back again?