Echoes and sonar test questions - CCEA - GCSE Physics (Single Science) Revision

1

What type of wave is sound?

Electromagnetic

Longitudinal

Transverse

2

Through which of the following can sound not travel?

Air

A vacuum

Water

3

What is the approximate speed of sound in air?

330 m/s

1500 m/s

300,000,000 m/s

4

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

The sound wave is loud

The sound wave is high pitched

The sound wave is above the clouds

5

What is the range of normal human hearing?

2 Hz to 2000 Hz

20 Hz to 2000 Hz

20 Hz to 20,000 Hz

6

What is ultrasound?

Sound waves above the range of human hearing

Sound waves within the range of human hearing

Sound waves below the range of human hearing

7

Which of these is not a use of ultrasound?

Internal body scans

Measuring the size of earthquakes

Cleaning jewellery

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.

148 m

296 m

14,800 m

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?

0.019 s

0.038 s

4420 s