How far above or below the ecliptic can the Sun move?
What will be an ideal response?
The Sun follows the ecliptic eastward across the sky, never leaving it.
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Einstein's cosmological constant is a leading candidate for the "dark energy."
Indicate whether the statement is true or false
A 0.20-km wide river has a uniform flow speed of 4.0 m/s toward the east. It takes 20 s for a boat to cross the river to a point directly north of its departure point on the south bank. In what direction must the boat be pointed in order to accomplish this?
a. 23° west of north b. 20° west of north c. 24° west of north d. 22° west of north e. 17° west of north
The vibrations of the Sun reveal information about:
A) the temperature of the core of the Sun. B) the structure of the atmosphere of the Sun. C) the interior structure of the Sun. D) the production of energy in the Sun. E) the magnetic field of the Sun.
The frictional force of the floor on a large suitcase is least when the suitcase is
A. pushed by a force parallel to the floor. B. dragged by a force parallel to the floor. C. pulled by a force directed at an angle ? above the floor. D. pushed by a force directed at an angle ? into the floor. E. turned on its side and pushed by a force parallel to the floor.