The force in member FE of the plane truss below is approximately:
(A) 21.5 kN
(B) 22.2 kN
(C) 3.9 kN
(D) 4.7 kN
(C) 3.9 kN
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Earth's internal layers were discovered by studying the movement of P- and S- waves through Earth's interior. In comparison to S-waves, the movement of P-waves is
A) fast, compressing and expanding the rock as they move through it. B) fast, vibrating the rock particles up and down and side-to-side. C) slower and can travel through solid granite, magma, water or air. D) slower and can travel only through solids, not liquids.
The change in shape due to transport of atoms along grain boundaries is called _________creep.
Fill in the blank(s) with the appropriate word(s).
We can describe a position on Earth's surface by stating its
A) altitude and azimuth. B) altitude and direction. C) latitude and direction. D) latitude and longitude. E) meridian and longitude.
As the harmonic numbers get larger, the wavelengths get smaller and the frequencies:
a. do not change. b. sometimes get larger and sometimes get smaller. c. get larger. d. stay the same. e. get smaller.