100
they are sound waves with frequencies ranging from 20 to 20,000 Hz
"can't be heard by humans."
See page 101 of your study unit. In there you will find that radio frequencies used by commercial radio broadcasting stations range from about 550,000 Hz to 1,700,000 Hz.
No. Such sounds are suprsonic sounds.
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they are sound waves with frequencies ranging from 20 to 20,000 Hz
"can't be heard by humans."
See page 101 of your study unit. In there you will find that radio frequencies used by commercial radio broadcasting stations range from about 550,000 Hz to 1,700,000 Hz.
No, you can measure anything with a cyclic behavior with hz. eg light waves, radio waves, oceanic waves, car engines, meeting schedules, orbital frequencies.
Frequencies: .003 - 4 x 1014 Hz
Gamma rays, with frequencies above 1019 Hz.
Ultrasonic and Infrasonic sound waves are waves that are not audible to human beings. The audible region contains sound waves of 16 Hz to 20,000 Hz.Infrasonic sound waves have frequencies below 16 Hz. For example, an earthquake.Ultrasonic sound waves have frequencies above 20,000 Hz. For example, x-rays.Grade 11 Physics
No. Such sounds are suprsonic sounds.
for this answer it's false i made a 90 on this test :)
ELF radio waves or extremely low frequency radio waves. These may have frequencies below 1 Hz in some cases!
Frequencies above 20kHz are not audible to humans. Sounds above this frequency are called ultrasound.
1000 Hz. The others are outside the range of human hearing. You can feel 10 Hz but not hear it. C. 1,000 Hz