What type of wave is sound?
Electromagnetic
Longitudinal
Transverse
Through which of the following can sound not travel?
Air
A vacuum
Water
What is the approximate speed of sound in air?
330 m/s
1500 m/s
300,000,000 m/s
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
What is the range of normal human hearing?
2 Hz to 2000 Hz
20 Hz to 2000 Hz
20 Hz to 20,000 Hz
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
Which of these is not a use of ultrasound?
Internal body scans
Measuring the size of earthquakes
Cleaning jewellery
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
When measuring the speed of sound using the clap–echo method, the main source of error is:
Measuring the distance with the trundle wheel.
Human reaction time using the stop clock.
Clapping the wooden blocks together.