Which part of the electromagnetic spectrum has the lowest frequency?
A) ultraviolet B) infrared C) gamma D) visible E) radio
E
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How far must one travel to escape Earth's gravitational field?
A) to a region above Earth's atmosphere B) to a region well beyond the Moon C) to a region beyond the solar system D) forget it; you can't travel far enough.
The star Wolf 1061 has a parallax of 2.34 arcseconds, while the star Ross 652 has a parallax of 1.70 arcseconds. What can you correctly conclude?
A) Both stars are outside the Milky Way galaxy. B) Wolf 1061 must have a larger proper motion than Ross 652. C) Ross 652 must have a larger proper motion than Wolf 1061. D) Ross 652 is closer to Earth than Wolf 1061. E) Wolf 1061 is closer to Earth than Ross 652.
An important underlying feature of hydraulic devices is the conservation of
A) pressure. B) momentum. C) energy. D) all of the above E) none of the above
_____ says that the amount of energy flowing out of the top of a layer in the star must be equal to the amount of energy coming in at the bottom, plus whatever energy is generated within the layer
A) The law of energy equilibrium B) The law of conservation of energy C) Mass-energy equivalence D) Newton's law of energy transfer