erock1587 erock1587
  • 15-02-2018
  • Physics
contestada

Sound waves with a frequency above 20,000 Hz are referred to as
infrasonic waves
ultrasonic waves
sonic booms
doppler waves

Respuesta :

CometZ CometZ
  • 15-02-2018
Ultrasonic waves is the answer
Answer Link
Anissaamaris10
Anissaamaris10 Anissaamaris10
  • 22-01-2020

Answer: The answer is ultrasonic waves.

Explanation:  they use these waves for big machines because they have a powerful charge.

Answer Link

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