Standing Waves on a String: Two Violinists Are Trying to Tune

question 3

Multiple Choice

Standing waves on a string: Two violinists are trying to tune their instruments in an orchestra. One is producing the desired frequency of 440.0 Hz. The other is producing a frequency of 448.4 Hz. By what percentage should the out-of-tune musician change the tension in his string to bring his instrument into tune at 440.0 Hz?

• A) +1.9%
• B) -1.9%
• C) +3.7%
• D) -3.7%
• E) +8.4%

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Definitions:

Fluid-Mosaic Model

The fluid-mosaic model describes the structure of cell membranes as a mosaic of components, including proteins, lipids, and carbohydrates, that gives the membrane a fluid character.

Phospholipids

A class of lipids forming the major component of cell membranes, consisting of a phosphate group, a glycerol backbone, and two fatty acid tails.

Plasma Membrane

A membrane made of two layers of lipids encircles the cell, managing how substances move into and out of it.

Intracellular

Located or occurring within a cell or cells.