Tag Archive for: speed of sound

Direct Echo-Based Measurement of the Speed of Sound
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Figure 1: Distance vs. time a firecracker report echoed off of a building at different distances on both a cold and a warm day.The speed of sound…

Why Rigid Rods Can’t Send Faster-Than-Light Signals
Why a rigid rod can't send faster-than-light signals
One common proposal for achieving faster-than-light (FTL) communication is to use a long, perfectly…
