A metal alloy, such as steel, is
a. a compound.
b. a heterogeneous mixture.
c. a homogeneous mixture.
d. an element.
c
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A Udimet 700 turbine blade is exposed to a temperature of 1200 K (2160 R) at a tensile stress of 140 MPa (20 ksi)? How many hours is the turbine blade expected to survive these conditions?
What will be an ideal response?
According to the Big Bang theory, how many forces, and which ones, operated in the universe during the GUT era?
A) two forces: gravity and a single force that later became the strong, weak, and electromagnetic forces B) one force that represented the unification of all four forces that operate today C) three forces: gravity, the strong force, and the electroweak force D) two forces: the strong force and the electroweak force
Room temperature is approximately
A) 68. K. B) 300.°F. C) 300. K. D) 68.°C. E) -68.°F.
A deuteron is accelerated from rest through a 10-kV potential difference and then moves perpendicularly to a uniform magnetic field with B = 1.6 T. What is the radius of the resulting circular path? (deuteron: m = 3.3 × 10^-27 kg, q = 1.6 × 10^-19 C)
a. 19 mm b. 13 mm c. 20 mm d. 10 mm e. 9.0 mm