A uniform solid sphere of mass M and radius R rotates with an angular speed ? about an axis through its center. A uniform solid cylinder of mass M, radius R, and length 2R rotates through an axis running through the central axis of the cylinder
What must be the angular speed of the cylinder so it will have the same rotational kinetic energy as the sphere? A) 2?/5
B) ?
C) 4?/5
D) 2?/
E) ?/
D
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Moment of Inertia: The figure shows scale drawings of four objects, each of the same mass and uniform thickness, with the mass distributed uniformly. Which one has the greatest moment of inertia when rotated about an axis perpendicular to the plane of the drawing at point P?
A. A B. B C. C D. D E. The moment of inertia is the same for all of these objects.
An aluminum fin is attached at both ends in a compact heat exchanger as shown. For the situation shown, determine the temperature distribution and the heat transfer through the fin.
What will be an ideal response?
A series of ocean waves, each 24.0 m from crest to crest and moving past an observer at a rate of 6.0 waves per second, has what speed?
a. 144 m/s b. 4 m/s c. 6 m/s d. 0.25 m/s
If the universe is closed, then its age will be
a. less than two-thirds of 1/H. b. more than two-thirds of 1/H. c. equal to 1/H. d. equal to H squared. e. equal to the square-root of H.