Inside the Roche Limit
A) ring systems cannot exist.
B) is where large moons form.
C) large moons are torn apart.
D) hydrogen can only exist in its liquid metallic form.
E) there is a gap in a planet's magnetic field.
C
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Suppose that inflation did not occur. In that case, the fact that the cosmic microwave background has the same temperature in opposite directions of the sky would be considered
A) surprising, because those locations would never have been close enough to have any light or matter exchanged between them. B) surprising, because we would not expect those locations to have the same age. C) natural, because everything in the universe is naturally expected to have the same temperature. D) natural, because quantum fluctuations in the early universe would have ensured that the whole universe had precisely the same temperature.
For the circuit shown in the figure, the inductors have no appreciable resistance and the switch has been open for a very long time
(a) The instant after closing the switch, what is the current through the 60.0-? resistor? (b) The instant after closing the switch, what is the potential difference across the 15.0-mH inductor? (c) After the switch has been closed and left closed for a very long time, what is the potential drop across the 60.0-? resistor?
The Triassic is a(n)
a. epoch. b. era. c. eon. d. period.
A parallel-plate capacitor of capacitance C is connected to a battery of voltage V until it is fully charged. The energy density in the capacitor is then equal to u
If the same capacitor is then connected to a battery of voltage 2V its energy density becomes equal to A) u. B) u/4. C) u/2. D) 2u. E) 4u.