A rigid body is rotating counterclockwise about a fixed axis. Each of the following pairs of quantities represents an initial angular position and a final angular position of the rigid body. If the object starts from rest at the initial angular position, moves counterclockwise with constant angular acceleration, and arrives at the final angular position with the same angular speed in all three
cases, for which choice is the angular acceleration the highest?
1.3 rad, 6 rad
2.-1 rad, 1 rad
3.1 rad, 5 rad
2
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(a) 100,000 times (b) 10,000 times (c) 1000 times (d) 100 times
Snell's Law: A thin laser beam traveling in air strikes the surface of a glass plate at 41.2° with the normal. In the plate, this beam makes an angle of 22.4° with the normal. What is the speed of light in this glass? (c = 3.0 × 108 m/s)
Fill in the blank(s) with the appropriate word(s).
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A) Rhea and Iapetus. B) Phoebe and Dione. C) Mimas and Tethys. D) Hyperion and Miranda. E) Titan and Enceladus.
Buoyancy: A cylinder, semicircular in cross-section, is 10 m long and 5.0 m in radius. It is completely submerged, with its flat bottom side horizontal and 8.0 m below the water surface, as shown in the figure. What is the magnitude of the net force on the curved upper surface of the half-cylinder? Neglect atmospheric pressure.
A. 2.0 × 106 N B. 2.5 × 106 N C. 3.0 × 106 N D. 3.5 × 106 N E. 4.0 × 106 N