The eighteenth-century naturalist Carolus Linnaeus is known for creating:
a. the theory of natural selection
b. a system for naming and classifying organisms
c. the biological species concept
d. the first microscope
e. the scientific method
b
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Potential of Point-Charges: Point charges +4.00 ?C and +2.00 ?C are placed at the opposite corners of a rectangle as shown in the figure. What is the potential difference VA - VB? (k = 1/4??0 = 8.99 × 109 N ? m2/C2) 
A. +203 kV B. -203 kV C. -22.5 kV D. +22.5 kV E. 0.00 kV
A 2.3 cm tall statue is 15. cm in front of a convex mirror. The mirror radius of curvature is 18. cm. (a) Is the image real or virtual? (b) How far is the image from the mirror? (c) Is the image upright or inverted? (d) How high is the image?
What will be an ideal response?
The theory that Mercury shrank slightly when it was young has been proposed to explain
a. extended lava plains. b. large craters. c. magnetic field. d. lobate scarps. e. regolith.
Underdeveloped countries can gain by exploiting low-head hydroelectricity
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