H.W on sound waves

The scientific term that expresses the strength and the weakness of sound is..................

• intensity

• resonance
• frequency
• pitch

Answer explanation

Tags

NGSS.MS-PS4-1

The intensity of sound is directly proportional to.......................

• speed of the sound wave
• square of the amplitude of the sound wave
• inverse of the frequency of the sound wave
• amplitude of the sound wave

Answer explanation

Tags

NGSS.MS-PS4-1

The intensity of sound weakens as we go away from its source, because .......................

• 
• 
• 
• 

Answer explanation

Tags

NGSS.MS-PS4-1

NGSS.MS-PS4-2

When the distance between the sound source and the ears is doubled,

the sound intensity ..................

• remains the same
• decreases to its half.

• decreases to its quarter.

• ncreases four times,

Answer explanation

Tags

NGSS.MS-PS4-1

The measuring unit of sound intensity is .........................

• hertz
• watt
• ampere
• decibel

All of the following are factors affecting sound intensity, except the .................................

• amplitude of vibration.

• medium density.

• frequency

• wind direction

Answer explanation

Tags

NGSS.MS-PS4-1

The resonance box increases the intensity of sound because it ............................

• decreases the vibrating surface area.

• increases the vibrating surface area.

• increases the frequency of the produced sound.

• decreases the pitch of the produced sound.

Answer explanation

Tags

NGSS.MS-PS4-1

The figure ................. represents the relation between the sound intensity and the

density of the medium.

• 
• 
• 
• 

Answer explanation

Tags

NGSS.MS-PS4-2

Sounds of different musical instruments can be differentiated from each other by ....................

• frequency

• fundamental tone.

• harmonic tones.

• sound intensity.

Answer explanation

he human ear can distinguish between sounds that are equal in pitch and intensity

if their sources are different, because the fundamental tone is accompanied by

harmonic tones, which are .......................

• higher in intensity and frequency.

• lower in intensity and higher in frequency.

• lower in intensity and frequency.

• higher in intensity and lower in frequency.mental tone

Answer explanation