How Long Does It Take from Emitting an Ultrasonic Signal

question 18

Multiple Choice

How long does it take from emitting an ultrasonic signal until its return as an echo from a flat interface between a soft tissue and a muscle, if the thickness of a soft tissue is 2.5 cm? Assume that the speed of sound in soft tissue is 1450 m/s.

• A)17.2 ìs
• B)34.5 ìs
• C)1.72 ms
• D)3.45 ms

---

Definitions:

Lewd

Offensive in a sexual way; showing or intended to excite sexual desire or interest that is considered inappropriate.

Sexually Offensive

Pertaining to actions, speech, or gestures that are inappropriate, harassing, or abusive in a sexual manner.

Career Advancement

The process of making progress in one’s job or professional path through promotions, learning new skills, or taking on more responsibilities.

Sexual Advances

Unwanted or inappropriate efforts to establish a sexual relationship, which can lead to discomfort or constitute harassment.