Gentle tidal interactions are probably necessary to support the formation of _______________ in a galaxy
Fill in the blank(s) with correct word
spiral arms
spirals
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A series RLC circuit has a capacitive reactance of 16 
and an inductive reactance of 4.0
at 30 Hz. What frequency would result in resonance for this circuit?
A. 12 Hz B. 60 Hz C. 15 Hz D. 7.5 Hz E. Resonance is not possible in this case.
A radio station broadcasts at a frequency of 80 MHz. How far from the transmitter will this signal travel in 67 ms? (c = 3.0 × 108 m/s)
A) 60 × 106 m B) 67 m C) 40 km D) 80 km E) 20 × 106 m
Nuclear stability is related to the balance between
A) attracting and repelling forces in the nucleus. B) positive and negative ionic forces. C) both of these D) neither of these
The Big Bang is a theory describing the ____
a. birth of our Solar System b. start of civilization on Earth c. beginning of planet formation d. beginning of the Universe e. massive extinction of dinosaurs