An incompressible ideal fluid flows steadily through a pipe that has a change in diameter. The fluid speed at a location where the pipe diameter is 8.0 cm is 1.28 m/s. What is the fluid speed at a location where the diameter has narrowed to 4.0 cm?
A) 0.32 m/s
B) 0.64 m/s
C) 1.3 m/s
D) 2.6 m/s
E) 5.1 m/s
E
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Why have very few planets with low mass (comparable to Mars or Mercury) been found?
A) These small planets are very rare. B) Low mass planets do not produce large enough radial velocity changes in their stars. C) High mass planets are blocking our views of low mass planets. D) Hot Jupiters have ejected most low mass planets from their solar systems. E) Low mass planets are too far from their parent stars to receive enough light to make them visible from Earth.
Suppose you place your face in front of a concave mirror
A) If you position yourself between the center of curvature and the focal point of the mirror, you will not be able to see your image. B) No matter where you place yourself, a real image will be formed. C) Your image will always be inverted. D) Your image will be diminished in size. E) None of these is true.
In materials like glass or water, the speed of light is ________.
A. increased B. reduced C. the same as in a vacuum D. sometimes reduced and sometimes increased
In Figure 9.5, for the temperature 973 K, the power of the stress term changes between the logarithm of stress of 7 and the logarithm of stress of 7.3. Determine the value of the power n at these two values of stress, using the data points given to either side of these stresses.
What will be an ideal response?