Any Sound from One Focus of an Ellipse Reflects Off

question 44

Multiple Choice

Any sound from one focus of an ellipse reflects off the ellipse directly back to the other focus. This property explains whispering galleries such as Statuary Hall in Washington, D.C. The whispering gallery shown in illustration has the shape of a semi-ellipse. Find the distance sound travels as it leaves focus F and returns to focus F'.

• A) 59.4 meters
• B) 29 meters
• C) 29.7 meters
• D) 30.3 meters
• E) 31.4 meters

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Definitions:

Aggressive Instincts

The innate or inherent impulses that drive individuals to act or react in hostile and confrontational ways.

Personal Weakness

Individual traits or characteristics perceived as areas of improvement or vulnerability, often impacting personal development or performance.

Harry Stack Sullivan

An American psychiatrist known for his theory of interpersonal relations and his influence on the development of psychoanalytic theories of personality.