The Speed of Sound Through the Ground Is About 6

question 277

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

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Definitions:

Great Migration

The movement of six million African Americans out of the rural Southern United States to the urban Northeast, Midwest, and West from about 1916 to 1970.

Sharecropping Opportunities

Refers to a system where individuals, often former slaves and their descendants, farmed land owned by another in return for a share of the crops, a practice common in the Southern United States after the Civil War.

European Immigration

The movement of people from Europe to other countries for reasons such as economic opportunity, escape from persecution, or family reunification, significantly shaping the demographics of the receiving countries.

Residential Instability

Residential instability denotes frequent changes in living situations or housing, which can reflect and contribute to social and economic instability.