Which of the following statements about sidereal and solar days is not true?
A) A sidereal day is the definition of a day on the Earth and a solar day is the definition of a day on the Sun.
B) A solar day is approximately 4 minutes longer than a sidereal day.
C) A solar day is the amount of time between successive appearances of the Sun on our meridian.
D) A sidereal day is the amount of time between successive appearances of any star on our meridian.
A
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Atomic Nucleus: The atomic number of an atom is equal to the number of what particles in the nucleus?
A. protons B. neutrons C. nucleons D. electrons E. positrons
If you are driving down a highway at 65 mph with your headlights on, the speed of the light emitted from your headlights as seen by a person standing on the side of the road is
a. c. b. c + 65 mph. c. slightly greater than c. d. none of the above.
How is the sun situated in the universe?
A) The sun is an isolated star that is far outside of all the galaxies in the universe, and is thus not part of any galaxy. B) The sun is just one of a large number of stars, and is located on the fringes of the Milky Way galaxy, which itself is just one galaxy among many galaxies. C) The sun is just one of many stars, and is located near the center of the rest of the stars in the universe. D) The sun is at the center of the universe. E) Earth is at the center of the universe, and the sun orbits around the earth.
When a meteoroid enters Earth's atmosphere, it is called a(n) ______________
Fill in the blank(s) with correct word