If spectroscopic luminosity classification gives us an estimated distance to the faint star SAO 47552 of about 3300 light-years, then its parallax would be only
A) 0.1". B) 0.01". C) 3.3". D) 0.033". E) 0.001".
E
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Which planetary fact(s) is(are) explained by the solar nebula theory?
a. The orbits are all approximately in the same plane b. The orbits are all in the same direction c. Jovian planets are mostly H and He d. Terrestrial planets are mostly rock and iron e. All of the other choices are correct.
A car travels in a due northerly direction at a speed of 55 km/h. The traces of rain on the side windows of the car make an angle of 60 degrees with respect to the horizontal. If the rain is falling vertically with respect to the earth, what is the speed of the rain with respect to the earth?
a. 48 km/h b. 95 km/h c. 58 km/h d. 32 km/h e. 80 km/h
_____ is a telescope that forms images by bending light with a lens
A) A refracting telescope B) A reflecting telescope C) The Newtonian telescope D) The Gregorian telescope
What is one piece of scientific evidence for human contributions to global climate change?
A) There is no compelling evidence for human contributions to climate change; the correlations do not show what causes them. B) Humans deplete the ozone layer, allowing more ultraviolet radiation to reach the Earth. C) Humans burn forests, drive cars, and build power plants that directly heat the planet. D) Climate models show that extra carbon dioxide contributed by humans is enough to match the temperature data. E) Humans are responsible for every possible change to the planet, since humans are the only intelligent life forms.