Water Pressurized to 4 * 10⁵ Pa Is Flowing at 5.0

question 23

Multiple Choice

Water pressurized to 4 * 10⁵ Pa is flowing at 5.0 m/s in a pipe which contracts to 1/3 of its former area. What are the pressure and speed of the water after the contraction? (density of water = 1 * 10³ kg/m³)

• A) 2 * 10⁵ Pa, 15 m/s
• B) 3 * 10⁵ Pa, 10 m/s
• C) 3 *10⁵ Pa, 15 m/s
• D) 4 * 10⁵ Pa, 1.5 m/s

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Definitions:

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in economics, refers to a school of thought that emphasizes free markets, the role of competition, and the minimal intervention of government in the economy, foundational to later economic theories.

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The relationship and dynamics between the compensation paid to labor and the cost of goods and services in an economy.

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A situation in an economy where all available labor resources are being used in the most efficient way possible, typically reflected by the absence of cyclical unemployment.

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Relates to John Maynard Keynes, a UK-based economist whose notions significantly altered macroeconomics theory and the financial policies of governments.