Torques T 5 5.7 kN # m are applied to a hollow aluminum shaft (G 5 27 GPa and d1 5 52 mm). The allowable shear stress is 45 MPa and the allowable normal strain is 8.0 3 1024. The required outside diameter d2 of the shaft is approximately:
(A) 38 mm
(B) 56 mm
(C) 87 mm
(D) 91 mm
(D) 91 mm
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Graphical Analysis: The graph in the figure shows the position of a particle as it travels along the x-axis. What is the magnitude of the average speed of the particle between t = 1.0 s and t = 4.0 s?
A. 1.0 m/s B. 1.3 m/s C. 0.67 m/s D. 0.50 m/s E. 0.25 m/s
Velocity Addition: A star is moving toward Earth at 90% the speed of light. The star emits light, which moves away from the star at the speed of light. What do Earth-based astronomers measure for the speed of this light?
A. c B. 1.9c C. 1.2c D. 0.98c E. 0.95c
According to Faraday’s Law of Electromagnetic Induction, the induced voltage is equal to
A. the rate of change of the magnetic flux B. the rate of change of the magnetic field strength C. the rate of change of the magnetic force D. the rate of change of the loop area
Steven Weinberg, Abdus Salam, and Sheldon Glashow shared the 1979 Nobel Prize in physics for their development of a(n)
a. electroweak theory. b. GUT. c. quark theory. d. generalized theory of relativity. e. theory of strangeness.