A 2.0-m string is fixed at both ends and tightened until the wave speed is 78 m/s. What is the frequency of the standing wave shown in the figure? 
Definitions:
Equity Multiplier
A financial ratio indicating how much of a company's assets are financed by stockholder's equity, illustrating the degree of financial leverage used.
Times-Interest-Earned (TIE) Ratio
Determined by dividing earnings before interest and taxes by the interest charges. This ratio measures the extent to which operating income can decline before the firm is unable to meet its annual interest costs.
Debt Ratio
A financial ratio that measures the extent of a company’s leverage, calculated as total liabilities divided by total assets.
Mark To Market
An accounting method that measures the fair value of accounts that can fluctuate over time, such as assets and liabilities.
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