The reason that most extrasolar planets are found close to their parent stars is
A) the planets reflect more light the closer they are to the star.
B) more of the starlight is blocked by the planet when it transits the star.
C) the amount and frequency of the star's motion are both higher.
D) the closer to a star, the hotter and therefore brighter the planet is.
E) planets that are close to a star are heated up and therefore larger.
C
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The planet with the polar "ice caps" of frozen carbon dioxide is ______________
Fill in the blank(s) with correct word
How does the age of the universe depend on Hubble's constant, and why?
What will be an ideal response?
If the rate of change of the magnetic field applied to a loop of wire is doubled, what happens to the induced emf in that loop assuming all the other parameters remain unchanged?
A) It is doubled. B) It stays the same. C) It is reduced by a factor of 2. D) It is quadrupled. E) It is reduced by a factor of 4.
It was a dark and stormy night, when suddenly you saw a flash of lightning. Three-and-a-half seconds later you heard the thunder. Given that the speed of sound in air is about 340 m/s, how far away was the lightning bolt?