The Ga-As phase diagram has a compound GaAs (?-phase) that is a single vertical line at 50 atomic % As. Can ?-phase be produced that has 55 atomic % As? _____________
Fill in the blank(s) with the appropriate word(s).
No
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Identify the FALSE statement. You could summarize our Solar System's development by saying:
it formed solely from atoms generated by the big bang. its formation began as gravity pulled material into a bulbous disc. the central ball of the bulbous disc developed into the Sun. outlying material of the disc condensed into planetesimals. planetesimals coalesced to form the planets.
When the alignment of the Sun, the Moon, and Earth produce a solar eclipse, the body between the other two is the
A) Sun. B) Moon. C) Earth.
What temperature has the Big Bang cooled to by now?
A) 1.4 K B) 5,800 K C) about 3,000 K D) about 300 K E) just over 2.7 K
The y component of the electric field of an electromagnetic wave traveling in the +x direction through vacuum obeys the equation Ey = (375 N/C) cos[kx - (2.20 × 1014 rad/s)t]. What is the wavelength of this electromagnetic wave? (c = 3.0 × 108 m/s)
A) 0.272 µm B) 1.36 µm C) 2.72 µm D) 8.57 µm E) 17.1 µm