Two Motors in a Factory Are Running at Slightly Different

question 23

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 rpm. 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) 1.79 s
• B) 1.43 s
• C) 1.66 s
• D) 1.54 s

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Definitions:

Call Premium

The amount above the par value a bondholder receives if the issuer redeems a bond before its maturity date.

Semiannually

A term describing an action or event that occurs twice a year.

Semiannual Coupon

A bond or fixed-income security payment made to its holder twice a year as interest for the investment.

Coupon Rate

The interest rate stated on a bond or other fixed-income security that the issuer promises to pay the holder until maturity.