Four Waves Are Described by the Following Expressions, Where Distances

question 18

Multiple Choice

Four waves are described by the following expressions, where distances are measured in meters and times in seconds. I y = 0.12 cos(3x - 21t)
II y = 0.15 sin(6x + 42t)
III y = 0.13 cos(6x + 21t)
IV y = -0.23 sin(3x - 42t)
Which of these waves have the same speed?

• A) I and II
• B) I and III
• C) II and III
• D) III and IV
• E) II and IV

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Definitions:

Fetal Pulmonary Trunk

A vessel in the developing fetus that carries blood from the right ventricle of the heart to the lungs.

Ligamentum Arteriosum

A small ligament that is the remnant of the ductus arteriosus formed within three weeks after birth, connecting the pulmonary artery to the proximal descending aorta.

Fetal Aorta

The primary artery in the fetus that carries oxygenated blood from the heart to various parts of the body, evolving from the embryonic heart.

Axillary Artery

A major blood vessel that carries oxygenated blood to the lateral aspect of the thorax, the axilla (armpit), and the upper limb.