A series of intersecting straight lines with distances and angles of intersection noted describes:
a. A series of contours
b. A profile
c. A hydrographic map
d. A traverse
e. A nautical map
d
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Write the equation that describes the average surface temperature of the earth as described by a black body.
What will be an ideal response?
S.S. Brenner, (Jour.Appl.Phys., 27 1484 [1956]), has reported that iron whisker single crystals may have a tensile strength of 13,130 MPa. Assume that the iron whiskers have a <100> orientation; that is, a <100> direction of the crystal lies along its central axis.
(a) Compute the magnitude of the shear stress on the most highly stressed {110}<111> slip systems when the ultimate tensile strength is attained. How many of these slip systems are there? (b) The shear modulus, ยต, along a <100> direction of a {110} plane is 59,810 MPa. Compute the ratio of ?tmax/u. (c) According to theoretical calculations, the maximum shear strength of a crystal should be ofthe order of 10u ? to 30u? . How does the value obtained in (b) of this problem compare to the theoretical predictions? (d) Now assume that one of the slip planes is ideally oriented, so as to have both ? and ? in the resolved shear stress equation equal to 45 degrees, and compute ?tmax/u (e) On the basis of these calculations, what can one conclude about the occurrence of slip in the iron whiskers? Does this signify anything about the perfection of the crystal structure in the iron crystal whiskers?
Technician A says to check coolant level in the radiator when it is hot. Technician B says to check coolant level in the radiator when it is cool. Which technician is correct?
A) Technician A only B) Technician B only C) Both technicians D) Neither technician
How is a plug-in hybrid different from a standard hybrid vehicle?
A) Is able to operate farther in electric-only mode B) Has a larger battery capacity C) Has an electrical charging port D) All of these