Two Harmonic Waves Are Described By $$y _ { 1 } = ( 3 \mathrm {~cm} ) \sin \left( \frac { 8.0 } { \mathrm {~m} } x + \frac { 2.0 } { \mathrm {~s} } t \right)$$

question 3

Multiple Choice

Two harmonic waves are described by $$y _ { 1 } = ( 3 \mathrm {~cm} ) \sin \left( \frac { 8.0 } { \mathrm {~m} } x + \frac { 2.0 } { \mathrm {~s} } t \right)$$ $$y _ { 2 } = ( 3 \mathrm {~cm} ) \sin \left( \frac { 8.0 } { m } x - \frac { 2.0 } { \mathrm {~s} } t \right)$$ What is the magnitude of the speed (in m/s) of the two traveling waves?

• A)16
• B)4.0
• C)8.0
• D)0.25
• E)2.0

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Definitions:

Marginal Revenue

The supplementary financial gain obtained through the sale of one more unit of a good or service.

Profit

The financial gain obtained when the amount earned from a business activity exceeds the expenses, costs, and taxes.

Marginal Revenue

The profit increment a business achieves through the sale of one extra unit of its offerings.

Macaws

Large, brightly colored parrots with long tails and powerful beaks, native to Central and South America.