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:

Variable Cost

Costs that fluctuate in relation to the level of output or production, such as raw materials and direct labor expenses.

Operating Cash Flow

Describes the cash generated by the regular operating activities of a business in a specific period.

Contribution Margin

The amount by which the sale of a product or service exceeds its production costs, contributing to the covering of fixed costs and generating profit.

Financial Break-Even

The point at which total revenues and total expenses are equal, resulting in a net income of zero and indicating that a project or business is neither losing nor making money.