A Long String Is Constructed by Joining the Ends of Two

question 34

Multiple Choice

A long string is constructed by joining the ends of two 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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