A Radio Wave Sent from the Surface of the Earth

question 49

Multiple Choice

A radio wave sent from the surface of the earth reflects from the surface of the moon and returns to the earth. The elapsed time between the generation of the wave and the detection of the reflected wave is 2.6444 s. Determine the distance from the surface of the earth to the surface of the moon. Note: The speed of light is 2.9979 × 10⁸ m/s.

• A)3.7688 × 10⁸ m
• B)3.8445 × 10⁸ m
• C)3.9638 × 10⁸ m
• D)4.0551 × 10⁸ m
• E)7.9276 × 10⁸ m

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Definitions:

Control Equation

A tool or formula used in management and operations to assess and maintain the balance between desired outputs and various inputs or processes.

Performance Expectations

The standards or requirements set by an employer regarding how tasks should be performed and goals should be achieved by employees.

Performance Deviations

Refer to variances between actual performance and the expected standard or goals, necessitating corrective actions or adjustments.

Performance Of People

The efficiency and outcome of individuals' work activities, often measured against pre-defined standards or goals.