The creation of a planetary atmosphere from a planet's interior is called differentiation
Indicate whether the statement is true or false
False
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Observations and stellar evolution models indicate that the central star of a planetary nebula finally must contract and become a _____
A) yellow giant B) white dwarf C) red giant D) black dwarf
Halley's comet is named after the English scientist Edmund Halley because he
A) discovered it. B) was the first to see it in 1682. C) calculated its orbit and predicted that it would return in 1758. D) was the most famous astronomer in England during its appearance. E) was the first to publish pictures of it and report it to the International Astronomical Union (IAU).
An object is placed 50 cm in front of a concave mirror with a focal length of 25 cm. What is the magnification produced by the mirror?
A) -0.50 B) -1.0 C) +1.5 D) -2.0 E) +1.0
How many nanoseconds does it take for a computer to perform one calculation if it performs 6.7 x 107 calculations per second?
A) 15 ns B) 67 ns C) 11 ns D) 65 ns