A Certain String, Clamped at Both Ends, Vibrates in Seven

question 29

Multiple Choice

A certain string, clamped at both ends, vibrates in seven segments at a frequency of 2.40 × 10² Hz. What frequency will cause it to vibrate in four segments?

• A)89 Hz
• B)137 Hz
• C)274 Hz
• D)411 Hz
• E)420 Hz

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Definitions:

Vault Cash

Physical currency held by banks within their vaults, used to meet customer withdrawals and other cash needs.

Primary Reserve

It is the part of a country's reservable deposits held in cash or in deposits with the central bank, used to manage liquidity and fulfill regulatory requirements.

Secondary Reserve

Secondary Reserve includes assets that are not as liquid as primary reserves but can still be quickly converted into cash.

Board of Governors

The leading body of a federal reserve system, overseeing the policy direction and regulatory functions of the central bank.