A simple beam AB with an overhang BC is loaded as shown in the figure. The bending moment at the midspan of AB is approximately:
(A) 8 kN?m
(B) 12 kN?m
(C) 17 kN?m
(D) 21 kN?m
(B) 12 kN?m
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Answer the following statement true (T) or false (F)
Monochromatic light (? = 500 nm) is incident on a soap bubble (n = 1.40). What is the wavelength of the light (in nm) in the bubble film?
A. 255 B. 500 C. 700 D. 357 E. 422
In a diffraction experiment, light of 600. nm wavelength produces a first-order maximum 0.350 mm from the central maximum on a distant screen. A second monochromatic source produces a third-order maximum 0
870 mm from the central maximum when it passes through the same diffraction grating. What is the wavelength of the light from the second source?
The electric field at a point 2.8 cm from a small object points toward the object with a strength of 180,000 N/C. What is the object's charge q? (k = 1/4??0 = 8.99 × 109 N ? m2/C2)
A) -16 nC B) +16 nC C) -17 nC D) +17 nC