Ultrasonic waves possess certain distinct properties that make them useful in different fields.
(i) For each of the following applications, name one property of ultrasound that is primarily responsible for its usefulness:
(a) Medical imaging of internal organs
(b) Cleaning delicate electronic components
(c) Measuring the depth of the ocean
(d) Detecting flaws inside a metal block
(ii) Briefly explain how the property named in each case enables the stated application.