Question

which is one way that ultrasound technology may be used?
repairing fractured bones
locating misplaced electrical equipment
cleaning dirty surgical tools
canceling out unwanted noise

Explanation:

Ultrasound technology uses high - frequency sound waves. One of its applications is cleaning. The high - frequency vibrations of ultrasound can dislodge dirt and debris from surfaces. Surgical tools can be cleaned effectively using this principle. Fractured bones are repaired through orthopedic procedures (not directly by ultrasound in the way described here). Locating electrical equipment is more likely done with other detection methods (like electromagnetic sensors). Canceling out noise is a different concept (usually active noise cancellation which is not the same as ultrasound cleaning).

Answer:

cleaning dirty surgical tools