Front

What causes a decrease in the vibrations of vocal cords?

Back

Factors such as dehydration, fatigue, or illness can cause a decrease in the vibrations of vocal cords, leading to a lower speaking volume.

Front

Why do sound waves travel faster in water than in air?

Back

Sound waves travel faster in water because water is denser than air, allowing sound waves to transmit more quickly.

Front

What happens to the pitch of a sound as the frequency increases?

Back

As the frequency of a sound increases, the pitch of the sound also increases.

Front

Why does an empty glass produce a higher pitch sound than a glass with water when tapped?

Back

An empty glass vibrates more freely than a glass with water, resulting in a higher pitch sound.

Front

What is the Doppler Effect?

Back

The Doppler Effect is the change in frequency or wavelength of a wave in relation to an observer moving relative to the wave source.

Front

How does temperature affect the speed of sound?

Back

The speed of sound increases with temperature because warmer air has more energy, allowing sound waves to travel faster.

Front

What is the relationship between frequency and wavelength in sound waves?

Back

Frequency and wavelength are inversely related; as frequency increases, wavelength decreases.

Front

What is amplitude in sound waves?

Back

Amplitude refers to the height of the sound wave, which determines the loudness of the sound.

Front

What is the difference between pitch and loudness?

Back

Pitch is determined by the frequency of the sound wave, while loudness is determined by the amplitude of the sound wave.

Front

What happens to sound in a vacuum?

Back

Sound cannot travel in a vacuum because there are no molecules to transmit the sound waves.