Lucky Cow by Mark Pett for June 12, 2016

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    John Wiley Premium Member almost 8 years ago

    A falling tree creates pressure waves in the air that become sound when they strike someone’s eardrum. It ain’t sound until you hear it.

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    Kokopelli  almost 8 years ago

    If you turn on your radio and walk outside where you can’t hear it, it is still making a sound.

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    zeondekilowatt  almost 8 years ago

    @KokopelliLeave Schrodingers cat in the house before you walk out. The cat will wave a paw if the radio is still making noise.

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