Two Small Forward-Facing Speakers Are 2

question 25

Multiple Choice

Two small forward-facing speakers are 2.50 m apart.They are both emitting,in phase with each other,a sound of frequency 1100 Hz in a room where the speed of sound is 344 m/s.A woman is standing opposite the midpoint between the speakers and is initially 35.0 m from the midpoint.As she slowly walks parallel to the line connecting the speakers,at what angle θ (relative to the centerline coming outward from the midpoint between the speakers) will she first hear no sound?

• A) 0.063°
• B) 3.6°
• C) 7.2°
• D) 1.8°
• E) 11°

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Definitions:

Norepinephrine

A neurotransmitter and hormone involved in the body's fight or flight response, affecting heart rate, blood pressure, and blood sugar.

Erythropoietin

A hormone produced by the kidneys that stimulates the production of red blood cells in the bone marrow.

Mineralcorticoids

A class of steroid hormones that regulate electrolyte and water balance by the kidneys.

Testosterone

A primary male sex hormone that plays key roles in the development of male reproductive tissues and secondary sexual characteristics.