The most noteworthy highlight of the Cenozoic era was the
A) break-up of Pangaea.
B) emergence of humans.
C) Pleistocene extinction.
D) ice age.
Answer: B
Physics & Space Science
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The mechanism by which planetary nebulae shine is very similar to that powering ________
Fill in the blank(s) with correct word
Physics & Space Science
A proton is accelerated from rest through a potential difference of 2.5 kV and then moves perpendicularly through a uniform 0.60-T magnetic field. What is the radius of the resulting path?
a. 15 mm b. 12 mm c. 18 mm d. 24 mm e. 8.5 mm
Physics & Space Science
During a period of high solar activity, most sunspots lie near the Sun's ________
Fill in the blank(s) with correct word
Physics & Space Science