A cantilever beam is loaded as shown in the figure. The bending moment at 0.5 m from the support is approximately:
(A) 12.7 kN?m
(B) 14.2 kN?m
(C) 16.1 kN?m
(D) 18.5 kN?m
(D) 18.5 kN?m
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Uncertainty Principle Using Momentum and Position: An electron is trapped in a quantum well that is 48.6 nm wide. Calculate the minimum uncertainty in its velocity. (h = 6.626 × 10-34 J ? s, melectron = 9.11 × 10-31 kg)
A. 7.49 × 103 m/s B. 1.79 × 104 m/s C. 2.38 × 103 m/s D. 3.34 × 104 m/s E. 1.01 × 103 m/s
If our eyes were sensitive only to X rays, the world would appear __________.
A. gray, black, and white like a medical X ray B. brighter than normal because X rays carry more energy than visible light photons C. dark because X-ray light does not reach Earth’s surface D. green, yellow, and orange, because those are the colors of X rays
No nuclide with an atomic number greater than ______________ is stable
Fill in the blank(s) with correct word
A perpetual motion machine of the second kind
A. violates the first law of thermodynamics B. would be a good investment C. violates the second law of thermodynamics D. violates the zeroth law of thermodynamics