Which science deals with the composition, structure, properties, and reactions of matter?
a. Thermodynamics
b. Geology
c. Physics
d. Chemistry
d
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Which of the following can act like a long-term "thermostat" for the Earth's average temperature?
A) heat stored in the Earth's magnetosphere B) the carbon dioxide cycle C) radioactive elements trapped in the Earth's mantle D) heat stored in the Earth's liquid core
A typical galaxy is a ________
A) relatively small, icy object orbiting a star B) collection of a few hundred million to a trillion or more stars, bound together by gravity C) system consisting of one or a few stars orbited by planets, moons, and smaller objects D) large, glowing ball of gas powered by nuclear energy E) nearby object orbiting a planet
The current in a 0.40 H inductor increases form 2.0 A to 3.0 A in 1.5 s. The energy stored by the inductor during this process increases by
A. 3.6 J. B. 1.8 J. C. 1.2 J. D. 1.0 J. E. 0.6 J.
A typical galaxy like our Milky Way galaxy contains
a. primarily planets. b. gas only c. stars (some with planets), gas and dust d. a single star and planets. e. thousands of superclusters.