grade 9

What type of wave is a transverse wave?

• Moves perpendicular to the direction of propagation

• Moves randomly in all directions

• Moves parallel to the direction of propagation

• Moves in a circular motion

What is the period of a pendulum dependent on?

• Mass and acceleration due to gravity

• Mass and length

• Length and mass of the bob

• Length and acceleration due to gravity

What is the speed of sound in air at 20°C?

• 331 m/s

• 343 m/s

• 1493 m/s

• 1533 m/s

What is the term for the bending of waves when they enter a medium where their speed is different?

• Interference

• Diffraction

• Refraction

• Reflection

What is the measure of the highness or lowness of a sound?

• Tone

• Pitch

• Loudness

• Timbre