Democritus said that, although we imagine many things, "in reality, there are only atoms and the void." This idea could best be classified as
A) witticism. B) stoicism. C) rationalism. D) idealism. E) materialism.
E
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A rectangular-shaped patio has a base length equal to (24.5 ± 0.2) m and a height equal to (9.3 ± 0.1) m. What is the area of the patio, including its uncertainty?
a. 228 ± 4 b. 228 ± 2 c. 228 ± 23 d. 228 ± 6
Suppose you have a heat source that gives off a bright white light. Then you lower the temperature. What happens to the light?
You find yourself on a silent airless world! The lack of an atmosphere means that you must be very careful not to look at the Sun so that you will not be blinded by its ultraviolet and X-ray radiation
However, you are able to determine that the Sun has about the same angular size that you are used to on Earth. Although this world is clearly lifeless, you are surprised to find footprints and car tracks etched in the powdery surface.
Temperature is a measure of
1.... the total amount of heat possessed by something. 2.... the flow of energy to or from something. 3.... the total energy possessed by something. 4.... the total kinetic energy of the constituents of something. 5.... the amount of useful work that could be extracted from something. 6.None of the above.