Sounds Physics IGCSE Form 3 MRSM Kuala Klawang

The .......... of a sound is the number of vibrations each ..............., measured in Hertz

• hertz, second

• hertz, frequency

• frequency, second

• echo, frequency

What is the hearing range of humans?

• 67hz-45000Hz

• 64hz-20000Hz

• 2000hz-110000Hz

• 20hz-2000Hz

A sound with a higher pitch has a .... frequency

• greater

• smaller

• constant

• 1280 m/s

• 2400 m/s

• 3800 m/s

• 1450 m/s

a sound is produced by vibrating?

• molecules

• particles

• atoms

• all of these

Which one of the following instruments produces sound through vibrations??

• 
• 
• 
• 

what happens to the loudness of a sound if its amplitude decreases?

• increase

• decrease

• remains

which has the greater frequency?

• 0.010s

• 0.020s

• 0.090s

• 0.005s

What is the speed of sound in air?

• 330 m/s

• 370 m/s

• 210 m/s

• 410 m/s

what is the unit of frequency?

• kilometer

• Hertz

• kilogram

• seconds