A Vibrating Tuning Fork of 850 Hz Is Held Above $\Delta$

question 8

Multiple Choice

A vibrating tuning fork of 850 Hz is held above a tube filled with water.The first and third resonances occur when the water level is lowered by 8.8 cm and 47.6 cm from the top of the tube.If there is a small end correction that adds a small extra length $\Delta$ L to the effective length of the air column,calculate $\Delta$ L.Assume the speed of sound to be 330 m/s.

• A)0.2 cm
• B)0.9 cm
• C)0.4 cm
• D)0.6 cm
• E)1.1 cm

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Definitions:

Object-relations Therapy

A form of psychoanalysis that emphasizes interpersonal relations, primarily in the family and especially between mother and child.

Supportive Therapy

A type of psychotherapy that focuses on reinforcing a patient's coping mechanisms and providing emotional support rather than directly addressing the root causes of a condition.

Ego Analysis

A psychoanalytic approach focusing on the ego's functions and its relationship with the demands of the id, superego, and external world.

Psychodynamic Therapy

A therapeutic approach that emphasizes understanding the influence of the past on present behavior and utilizes the relationship between therapist and client to gain insights.