The Speed of Sound Through the Ground Is About 6

question 74

Multiple Choice

The speed of sound through the ground is about 6.0 km/s while the speed of sound in air is 343 m/s.A very powerful explosion occurs some distance away and you feel the ground vibrate 60 seconds before you hear the sound of the explosion.How far away is the explosion?

• A)20 km
• B)22 km
• C)25 km
• D)27 km
• E)30 km

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Definitions:

Olfactory Epithelium

The specialized epithelial tissue within the nasal cavity that is involved in smell, housing the sensory receptors for detecting odorants.

Axons

Long, slender projections of nerve cells that transmit electrical impulses away from the neuron's cell body to other neurons, muscles, or glands.

Place Theory

A theory in the field of psychophysics that suggests the perception of sound depends on where each component frequency produces vibrations along the basilar membrane of the inner ear.

Frequency Theory

A theory related to hearing that suggests the brain detects the frequency of an auditory signal by the rate at which the auditory nerve fires.