Solders are made from metals with a(n) _____________phase diagram, because alloys of the metals melt at a temperature lower than that of either of the two components individually.
Fill in the blank(s) with the appropriate word(s).
eutectic
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The purpose of using epicycles and deferents to explain the motion of the planets in the night sky was to account for
a. prograde motion. b. Mercury and Venus' limited angular distance from the Sun. c. retrograde motion. d. non-uniform speed of the planets in their orbits. e. precession of the equinoxes.
What two observations allow us to calculate mass of the portion of the Galaxy within the Sun's orbit?
A) the Sun's composition and luminosity B) the Sun's mass and its age C) the Sun's age and period of the Galactic Year D) the Sun's mass and velocity in orbit of the Galactic Center E) the Sun's orbital velocity and its distance from the Galactic Center
A primary reason for you to learn science, according to the textbook's opening section, is
A) to increase your awareness. B) to pass on Western culture to the next generation. C) because a broadly educated person can get a better job. D) to increase your intelligence. E) Actually there is no good reason all this scientific nonsense.
If the following generic atom were to undergo ionization, what would be the charge of the most likely product?
A) +2 B) -2 C) -6 D) +6 E) would probably not ionize