The Paleozoic is a(n)
a. epoch.
b. era.
c. eon.
d. period.
b
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A Life Calendar: Make a "life calendar" for hypothetical person. Assume that this person lived 80 years and represent the 80 year period as a single calendar year in which he or she was born on January 1st and died on December 31st
Estimate the calendar dates on which this person reached various life milestones. For example, when did he or she take their first step? Speak their first word? Start elementary school? Finish high school? When did he or she retire? Does your life calendar for this particular person give any insight into human lives in general?
A boulder rolls off of a very high cliff and experiences no significant air resistance. While it is falling, its trajectory is never truly vertical
A) True B) False
A point charge Q is placed at the origin. A second charge, 2Q, is placed on the x axis at x = ?3.0 m. If Q = 50 ?C, what is the magnitude of the electrostatic force on a third point charge, ?Q, placed on the y axis at y = +4.0 m?
a. 2.5 N b. 3.0 N c. 3.7 N d. 4.4 N e. 1.8 N
Which of the following best describes the image for a thin, concave lens that forms whenever the magnitude of the object distance is less than that of the lens's focal length?
a. inverted, diminished, and real c. inverted, enlarged, and real b. upright, diminished, and virtual d. upright, enlarged, and virtual