Ideal incompressible fluid flows through a 4.0-cm-diameter pipe at 1.0 m/s. There is a 2.0 cm diameter constriction in the line. What is the speed of the fluid in this constriction?
A) 0.25 m/s
B) 0.50 m/s
C) 2.0 m/s
D) 4.0 m/s
D
Physics & Space Science
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A. Hubble's law B. trigonometric parallax C. the Cepheid variable period-luminosity relationship
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In beta minus decay, the number of protons in the nucleus is
A) decreased by 1. B) decreased by 2. C) increased by 1. D) increased by 2. E) remains unchanged.
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Compared to a recoiling rifle, the bullet that is fired has a greater
A) momentum. B) kinetic energy. C) none of the above
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To the nearest percent, what fraction of an iceberg is submerged? (rice = 917 kg/m3, rsea = 1.03 × 10^3 kg/m3.)
a. 95% b. 93% c. 91% d. 89% e. 77%
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