The first eukarya appeared
A) 4.6 billion years ago
B) around 3.5 billion years ago
C) 4.0 billion years ago
D) at least 2.1 billion years ago or perhaps even earlier
D
Physics & Space Science
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A driver, traveling at 22 m/s, slows down her 2000 kg truck to stop for a red light. What work is done on the truck by the friction force exerted by the road on the truck?
A) -2.2 × 104 J B) -4.4 × 104 J C) -4.8 × 105 J D) -9.7 × 105 J
Physics & Space Science
The scientist ______________ is generally regarded as "the father of geology."
Fill in the blank(s) with correct word
Physics & Space Science
When we add a displacement vector to another displacement vector, the result is
a. a velocity. b. an acceleration. c. another displacement. d. a scalar.
Physics & Space Science
28Al decays by beta-minus decay. What is the daughter nucleus?
A. 28Mg B. 27Al C. 24Na D. 28Si E. 27Si
Physics & Space Science