Physical Limericks, by Andrew Yeats

 Exam Questions For Exam #1: (Assume a mass m, and a spring constant k) There once were a mass and a spring, To each other they firmly did cling. But one day in the lab Walter gave them a jab At what frequency did they to swing? (Acceptable answers: omega-naught, Sqrt[k/m]) For Exam #2: There once were three beads on a string, But one of them thought it was king. It sat in the middle Its thumbs it did twiddle In which normal mode did they swing? (Answer: Mode n=2)

 Just for Fun: On Phase in Complex Numbers: There once was a number named i, Whose beloved was moniker'd pi From atop their friend e And drinking green tea, They twisted each term that came nigh! On the pendulum mode: On a magical string hung a bob Hooked up with a spring to a blob When displaced right together Even without the tether United in motion they throb! On Matrix Multiplication: There once was a matrix named Fred, With a vector he wished to be wed. But Fred was too wide He had three on a side And the two column vector, she fled! On Intensity: When it seems that you have the propensity, To go off defining intensity, Choose an area wide As you wish to inscribe And on it just find power density! On Hilbert Space: David Hilbert once had an ambition To describe perfectly his condition He traced out a vector To the mind, quite a specter In dimensions of his own volition! On Group Velocity There’s no need to respond with ferocity If you’re asked to find group velocity Take the d’rivative in k Of omega – hooray! At k-average, you’ll find that monstrosity! (Note: Group velocity is not really a monstrosity.)

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