A Sound Source of Frequency F Moves with Constant Velocity

question 97

Multiple Choice

A sound source of frequency f moves with constant velocity (less than the speed of sound) through a medium that is at rest.A stationary observer hears a sound whose frequency is appreciably different from f because

• A)the equation that relates velocity of propagation,frequency,and wavelength of a sound traveling through a medium does not apply in this situation.
• B)the sound wave travels through the medium with a velocity different from that which it would have if the source were at rest.
• C)the frequency of the source is changed because of its motion.
• D)the wavelength established in the medium is not the same as it would be if the source were at rest.
• E)interference effects set up a standing-wave pattern that alters the frequency.

---

Definitions:

Health Care Market

The aggregation of all entities (providers, payers, and patients) involved in the production, distribution, and consumption of health care services.

Productivity Growth

The rate at which an economy's or an industry's output per unit of input (labor, capital, etc.) increases over time, indicating improvement in efficiency.

Asymmetric Information

A situation where one party in a transaction has more or better information than the other, often leading to an imbalance in the transaction.

Health Care Costs

The total expenditures for services and products related to the treatment and prevention of disease or the maintenance of health.