Ultrasound has frequency of vibration
A. between 20 and 20,000 Hz
B. below 20 Hz
C. above 20,000 Hz
D. between 500 and 10,000 Hz
Answer:C
Ultrasound has frequency of vibration
A. between 20 and 20,000 Hz B. below 20 Hz C. above 20,000 Hz D. between 500 and 10,000 Hz