In any particular place on Earth, certain constellations are visible in the evening only at certain times of the year because
A) our evening view of space depends on where Earth is located in its orbit around the Sun.
B) during some times of year, some constellations drop below the southern horizon.
C) some constellations are circumpolar.
D) on any particular night, we can only see stars that are directly opposite (180 degrees away from) the Sun in the sky.
A) our evening view of space depends on where Earth is located in its orbit around the Sun.
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A negatively charged grain of soot released between the parallel plates of a capacitor moves leftward. The potential between the parallel plates ________ (indicate whether it increases, decreases, or stays the same) from right to left, and the potential energy of the negatively charged grain of soot ________ (indicate whether it increases, decreases, or stays the same) from right to left.
Fill in the blank(s) with the appropriate word(s).
Kirchhoff's Rules: Determine the current in the 8.0-? resistor for the circuit shown in the figure. Assume that the batteries are ideal and that all numbers are accurate to two significant figures.
A. 0.28 A B. 1.3 A C. 1.6 A D. 2.1 A
Four 16-?F capacitors are connected in combination. What is the equivalent capacitance of this combination if they are connected
(a) in series? (b) in parallel? (c) such that two of them are in parallel with each other and that combination is in series with the remaining two capacitors?
From Voyager 2, Neptune's clouds appeared much more active than did Uranus', surprising since Neptune is smaller, colder, and farther from the Sun
Indicate whether the statement is true or false