An incompressible fluid is flowing through a vertical pipe with a constriction. The wide section is 2.00 cm in diameter and is at the top of the pipe. The pressure of the fluid in the wide section at the top is 200 kPa. The velocity of the fluid in the wide section is 4.00 m/s. The narrow section is 1cm in diameter and is located 2.00 m below the wide section. What is the pressure of the fluid in the narrow section? (density of the fluid is 1,000
A. 72 kPa
B. 80 kPa
C. 95 kPa
D. 105 kPa
E. 116 kPa
B. 80 kPa
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Calorimetry: An 920-g piece of iron at 100°C is dropped into a calorimeter of negligible heat capacity containing 50 g of ice at 0°C and 92 g of water, also at 0°C. What is the final temperature of the system? The specific heat of iron is 448 J/kg ? K, that of water is 4186 J/kg ? K, and the latent heat of fusion of water is 33.5 × 104 J/kg.
A. 0°C B. 11°C C. 14°C D. 24°C E. 32°C
Two long parallel wires are placed side-by-side on a horizontal table. If the wires carry current in the same direction,
A) one wire is lifted slightly while the other wire is forced downward against the table's surface. B) both wires are lifted slightly. C) the wires pull toward each other. D) the wires push away from each other.
Imagine that the magnet is moving downward instead of upward. 
In this situation, specify the directions of each of the vector quantities described below. Use the answer chart provided above and to the right (note that answers B and E refer to the +y and -y directions, respectively). What is the direction of 
at the origin (point O)?
A. A B. B C. C D. D E. E F. F T. Zero