Two Motors in a Factory Are Running at Slightly Different $786.0 \mathrm { rpm } \text {. }$

question 144

Multiple Choice

Two motors in a factory are running at slightly different rates.One runs at 825.0 rpm and the other at $786.0 \mathrm { rpm } \text {. }$ You hear the sound intensity increase and then decrease periodically due to wave interference.How long does it take between successive instances of the sound intensity increasing?

• A)1.54 s
• B)1.43 s
• C)1.66 s
• D)1.79 s

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Definitions:

Rotifera

A phylum of microscopic and near-microscopic pseudocoelomate animals known for their wheel-like ring of cilia at their front ends.

Abdominal Assessment

A systematic examination of the abdomen to check for signs of disease or abnormality, involving inspection, palpation, percussion, and auscultation.

Auscultation

The act of listening to sounds within the body, often using a stethoscope, to assess and diagnose various health conditions.

Palpation

The method of feeling with the hands or fingers during a physical examination to detect characteristics or conditions of the body.