Fully Destructive Interference Between Two Sinusoidal Waves of the Same $\degree$

question 71

Multiple Choice

Fully destructive interference between two sinusoidal waves of the same frequency and amplitude occurs only if they:

• A) travel in opposite directions and are in phase
• B) travel in opposite directions and are 180 \(\degree\)out of phase
• C) travel in the same direction and are in phase
• D) travel in the same direction and are 180 \(\degree\)out of phase
• E) travel in the same direction and are 90 \(\degree\) out of phase

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Definitions:

Automating

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Internal Rate Of Return

A financial metric used to evaluate the profitability of an investment, calculated as the discount rate that makes the net present value (NPV) of all cash flows from the investment equal to zero.

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Simple Rate Of Return

A method to calculate the profitability of an investment by dividing the annual incremental net operating income by the initial investment cost.