Answer:
Cleaning.
Explanation:
Ultrasound are the high sound waves that has the frequency above than 20kHz. The ultrsonic sound can be detected by animals like bats and has medical importance as well.
The cleaning of the medical instruments and machines are done by ultrasonic cleaners. These cleaners uses the ultrasonic waves to clean the dirt and needs a proper solvent medium for cleaning. The cavitation bubbles are produced that are used for cleaning.
Thus, the correct answer is cleaning.
Answer:
B. Observe the situation
Explanation:
A common method that is recommended for refusing negative peer pressure is known as the STOP method. STOP is an acronym that stands for:
Stop
Take a breath
Observe the situation
Proceed
Personal consequences
Please hit the thanks button :)
