A Long String Is Constructed by Joining the Ends of 2

question 68

Multiple Choice

A long string is constructed by joining the ends of 2 shorter strings. The tension in the strings is the same but string I has 4 times the linear mass density of string II. When a sinusoidal wave passes from string I to string II:

• A) the frequency decreases by a factor of 4
• B) the frequency decreases by a factor of 2
• C) the wave speed decreases by a factor of 4
• D) the wave speed decreases by a factor of 2
• E) the wave speed increases by a factor of 2

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