Answer 1

Two applications of ultrasound:

(i) Ultrasound is used for drilling holes or making cuts of desired shape in materials like glass.

(ii) Ultrasound is used in surgery to remove cataract and in kidneys to break the small stones into fine grains.

Answer 2

Applications of Ultrasonic sound
(i) Ultrasonic sound is used to detect the flaws in metal castings of automobile tyres.
(ii) It is used in hospitals to detect defects in certain parts of the body.