Due to the virulent spread of immorality among teachers in the United States, President Obama today decreed that teaching will be forbidden until a complete change occurs in human nature.
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Pendulum Types
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[image: The creepy fingers that grow from a vibrating cornstarch-water mix
can be modeled as a chain of inverted vertical pendulums
(DOI:10.1039/c4sm00265b...
1 day ago
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