As of the time of the publication of the textbook, how many planet candidates have been discovered using the transit method?
A) a few thousand B) tens of thousands C) a few hundred D) about 10
A
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Series/Parallel Circuits: A15-? resistor is connected in parallel with a 30-? resistor. If this combination is now connected in series with an ideal 9.0-V battery and a 20-? resistor, what is the current through the 15-? resistor?
A. 0.10 A B. 0.13 A C. 0.20 A D. 0.26 A
Length Contraction: How fast would a rocket ship have to move past Earth to contract to half of its proper length as observed by an Earth-based physicist?
Fill in the blank(s) with the appropriate word(s).
The Hertzprung—Russell diagram is a plot of
A) radial velocity against distance B) apparent brightness against time C) luminosity against distance D) luminosity against surface temperature
Emission lines from different ionization states of the same element appear in the same place in the spectrum
Indicate whether the statement is true or false