In hot-work, a metal is deformed at temperatures that are either above the ___________temperature, or above 50 % of the absolute melting temperature.
Fill in the blank(s) with the appropriate word(s).
recrystallization
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Which of these has a higher frequency than visible light?
A) radio wave B) microwave C) infrared wave D) ultraviolet wave E) all do
A car of mass 1 000 kg moves with a speed of 50 m/s on a circular track of radius 100 m. What is the magnitude of its angular momentum (in kg×m2/s) relative to the center of the race track?
a. 5.0 × 10^2 b. 5.0 × 10^6 c. 2.5 × 10^4 d. 2.5 × 10^6 e. 5.0 × 10^3
The most important idea in Copernicus' De Revolutionibus was placing the _______________ at the center of the Universe
Fill in the blank(s) with correct word
The expansion rate of the Universe is
A) increasing. B) decreasing. C) constant. D) different in different directions. E) independent of time.