Compressional Waves and Sound Properties

Walter Globe introduces compressional waves, also known as longitudinal waves, explaining their propagation direction aligns with the medium's displacement. Sound is highlighted as a common example, with its speed in dry air at 20°C being approximately 343 m/s. The video concludes by emphasizing that compressional waves can occur in various media.

What is another term for a compressional wave?

• Transverse wave

• Longitudinal wave

• Electromagnetic wave

• Surface wave

In which direction does the displacement of the medium occur in a longitudinal wave?

• In a circular motion

• In the same direction as the wave propagation

• Opposite to the wave propagation

• Perpendicular to the wave propagation

What is a common example of a compressional wave?

• Water

• Radio

• Sound

• Light

How is the speed of sound calculated?

• Frequency divided by wavelength

• Wavelength times frequency

• Amplitude times frequency

• Wavelength divided by amplitude

What is the approximate speed of sound in dry air at 20 degrees Celsius?

• 300 meters per second

• 343 meters per second

• 400 meters per second

• 500 meters per second

Which of the following is NOT a medium through which compressional waves can travel?

• Air

• Steel

• Vacuum

• Water

What is the primary characteristic of a compressional wave?

• It travels faster than light

• It requires a medium to propagate

• It can travel through a vacuum

• It is always visible