Why are there fewer large craters on the seafloor than on the continents?
A) The seafloor crust is younger than the continental crust.
B) The oceans slow large impactors and prevent them from making craters.
C) The oceans erode away craters faster than erosion processes on land.
D) Large impactors primarily strike land masses.
E) Large impactors aim for life-forms such as dinosaurs.
A
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Cluster ages can be determined from
A) main sequence fitting. B) main sequence turnoff. C) pulsating variable stars. D) spectroscopic binaries. E) visual binaries.
The total amount of power (in watts, for example) that a star radiates into space is called its
A) apparent brightness. B) absolute magnitude. C) luminosity. D) flux.
On a floodplain, stream flow is generally
A) laminar. B) turbulent. C) meandering. D) channeled.
Capacitance: If the result of your calculations for a quantity has SI units of C2 ? s2/(kg ? m2), that quantity could be
A. an electric potential difference. B. a dielectric constant. C. an electric field strength. D. a capacitance. E. an electric potential energy.