The measurement of space in any direction is called ______________
Fill in the blank(s) with correct word
length
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The Sun's life time is 10 billion years. About how long is the lifetime of a star with a star has a mass of 0.1 MSun and a luminosity of 0.01 LSun?
A) 1 billion years B) 100 million years C) 100 billion years D) 10 million years
When a formal definition of a planet in the solar system was adopted, Pluto was reclassified as a dwarf planet. What characteristic of planets does NOT describe Pluto?
A) Planets orbit the Sun. B) Planets are approximately spherical. C) Planets have cleared the neighborhood around their orbit. D) Planets orbit in ellipses with low eccentricity. E) Planets orbit in or very near the ecliptic plane.
Water can be turned to ice by
A) lowering the surrounding air pressure. B) extracting energy. C) both of these D) neither of these
In order for a body to exhibit simple harmonic motion there must be
A. a force drawing the body toward the center and decreasing with distance away from the center. B. a force drawing the body toward the center and increasing with distance away from the center. C. a constant force drawing the body toward the center. D. a constant force pushing the body away from the center. E. a force pushing the body away from the center and increasing with distance away from the center.