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

Physics & Space Science

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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

Physics & Space Science

The expansion rate of the Universe is

A) increasing. B) decreasing. C) constant. D) different in different directions. E) independent of time.

Physics & Space Science

Which of these has a higher frequency than visible light?

A) radio wave B) microwave C) infrared wave D) ultraviolet wave E) all do

Physics & Space Science

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

Physics & Space Science