Beats: Two Motors in a Factory Are Running at Slightly

question 93

Multiple Choice

Beats: Two motors in a factory are running at slightly different rates. One runs at 825 rpm and the other at 786 rpm. You hear the sound intensity increase and then decrease periodically due to wave interference. How much time elapses between successive maxima of the sound intensity?

• A) 1.5 s
• B) 1.4 s
• C) 1.7 s
• D) 1.8 s

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Definitions:

Categories of Definitions

Groups or classifications of definitions according to their subjects, uses, or characteristics.

Control Limits

Statistical boundaries in process control that indicate the acceptable range of variation for a process to remain in a state of control.

Operator

An individual or entity responsible for controlling machinery or systems, often within industrial or telecommunications settings.

Philip Crosby

An influential quality management expert best known for his philosophy that organizations should aim for "zero defects" to improve quality.