Magnesium alloys have low ductility because of their _________close-packed crystal structure.
Fill in the blank(s) with the appropriate word(s).
hexagonal
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The resultant force vector R (in newtons) is:
Bracket ADO is acted on by forces F and T and couple M (see figure). Assume that F 5 8 N, T 5 9 N and
M 5 12 N?m. Joint coordinates are in meters.
(A) -5i + 7j + 1k
(B) -3i + 4j - 3k
(C) -6i + 5j + 4k
(D) -3i + 6j + 2k
Which rocket would require more fuel?
A) one going from the Moon to Earth. B) one going from Earth to the Moon. C) both the same.
In each element of a series LRC circuit
A) the currents are not in phase. B) the currents and voltages are not in phase. C) the voltages are in phase. D) the currents are in phase. E) the currents and voltages are in phase.
The primary function of a moderator in a nuclear reactor is to
a. absorb neutrons. b. cool the fuel rods. c. slow down neutrons. d. transfer heat.