A Water Line Enters a House 2

question 44

Multiple Choice

A water line enters a house 2.0 m below ground. A smaller diameter pipe carries water to a faucet 5.0 m above ground, on the second floor. Water flows at 2.0 m/s in the main line and at 7.0 m/s on the second floor. Take the density of water to be 1.0 * 10³ kg/m³. The diffenernce in pressure in the main line is 2.0 *10⁵ Pa, then the pressure on the second floor is:

• A) 7.5 * 10⁴ Pa with the main line at the higher pressure
• B) 2.65 *10⁴ Pa with the main line at the higher pressure
• C) 7.5 * 10⁴ Pa with the main line at the lower pressure
• D) 2.65 * 10⁴ Pa with the main line at the lower pressure
• E) 9.4 *10⁴ Pa with the main line at the higher pressure

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