Which of the following are true statements about the extrasolar planets found so far?
A) Extrasolar planets have a much wider range of densities than the planets in the solar system.
B) Extrasolar planets fall neatly into the terrestrial and jovian categories.
C) Extrasolar planets all have nearly circular orbits.
D) All of the above are correct.
A) Extrasolar planets have a much wider range of densities than the planets in the solar system.
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Two objects move toward each other due to gravity. As the objects get closer and closer, the force between them
A) increases. B) decreases. C) remains constant.
The separation of red and blue light in single-lens telescopes is called ________ aberration
Fill in the blank(s) with correct word
Concrete is sold by the cubic yard. What is the mass, in kilograms, of one cubic yard of concrete that is five times as dense as water? (1 m = 1.094 yd, and 1 m3 of water has a mass of 1,000 kg.)
A) 764 kg B) 6546 kg C) 2420 kg D) 8733 kg E) 3819 kg
Alexander Litvinenko was assasinated with
A. plutonium B. tritium C. radium D. polonium