A metal alloy, such as steel, is

a. a compound.
b. a heterogeneous mixture.
c. a homogeneous mixture.
d. an element.


c

Physics & Space Science

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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?

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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

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Room temperature is approximately

A) 68. K. B) 300.°F. C) 300. K. D) 68.°C. E) -68.°F.

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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

Physics & Space Science