The youngest stars in the Orion Nebula and other star-forming regions also show
a. circumstellar disks.
b. jets.
c. circumstellar disks and jets.
c
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The second step in the precipitation-hardening process is to _________the alloy to maintain a uniform distribution of atoms in the grains at low temperature.
Fill in the blank(s) with the appropriate word(s).
Like Jupiter's other icy moons, Europa is covered with craters
Indicate whether the statement is true or false
A carbon resistor has a resistance of 18 ? at a temperature of 20°C. What is its resistance at a temperature of 120°C? The temperature coefficient of resistivity for carbon is -5.0 × 10-4/C°
A) 16 ? B) 18 ? C) 17 ? D) 15 ?
White light is spread out into spectral hues by a diffraction grating. If the grating has 1 000 lines per cm, at what angle will red light (l = 640 nm) appear in first order?
a. 14.7° b. 7.35° c. 17.7° d. 3.67° e. 1.84°