Problem: 1. Which one of the following frequencies of a wave in the air can be heard as an audible sound by the human ear? A. 1,000 Hz B. 100,000 Hz C. 0.10 Hz D. 10 Hz 2.  During the process of steel production, the flaws in steel casting are detected by A. ultrasonic vibrations. B. longitudinal vibrations. C. infrasonic vibrations. D. resonant vibrations. 

FREE Expert Solution

1.

An audible sound comes from an audible sound range, which is a specific range of frequencies that can be heard by human ears.

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Problem Details

1. Which one of the following frequencies of a wave in the air can be heard as an audible sound by the human ear? 

A. 1,000 Hz 

B. 100,000 Hz 

C. 0.10 Hz 

D. 10 Hz 


2.  During the process of steel production, the flaws in steel casting are detected by 

A. ultrasonic vibrations. 

B. longitudinal vibrations. 

C. infrasonic vibrations. 

D. resonant vibrations. 

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