At what angle, with the surface, must light strike glass (refractive index 1.6 ) in order to completely polarize the reflected ray?
A) 32°
B) 86.°
C) 34.°
D) 11.°
E) 56.°
A
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Uncertainty Principle Using Energy and Time: The energy released when an unstable electron state decays has an uncertainty of about 0.50 eV. What is the uncertainty in the life-time of the level? (h = 6.626 × 10-34 J ? s, 1 eV = 1.60 × 10-19 J)
A. 1.3 × 10-15 s B. 8.3 × 10-15 s C. 1.3 × 10-11 s D. 8.3 × 10-11 s
What is diffuse radiation?
What will be an ideal response?
If one of the caissons of the Falkirk Wheel contained a sunken boat, resting on its bottom, and the other carried a floating boat, the wheel balance would
A) still be maintained. B) be upset and more energy would be needed for operation. C) render the machine useless. D) violate Archimedes' principle.
How many nanoseconds does it take for a computer to perform one calculation if it performs 6.7 × 107 calculations per second?
A) 15 ns B) 67 ns C) 11 ns D) 65 ns