Which type or types of rock cannot be dated radiometrically?
A) igneous and metamorphic
B) sedimentary
C) metamorphic
D) igneous
B
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What makes direct imaging of exoplanets possible?
A. Exoplanets are very dim compared to their host star. B. Exoplanets emit their own light in visible wavelengths, where the host star is dimmer. C. Exoplanets reflect light directly toward their host star. D. Exoplanets emit their own light in the infrared, where the host star is dimmer. E. None of these choices are correct.
Alpha particles
A. have no charge B. are the same as electrons C. are the same as helium ions
In the Bohr model of the hydrogen atom the state of the atom is characterized by a single quantum number n
Indicate whether the statement is true or false
If C = 14 µF, what is the equivalent capacitance for the combination shown?
a.
28 µF
b.
17 µF
c.
0.29 µF
d.
7.0 µF
e.
?670 µF