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.Introduction
The…

Why a Rigid Rod Can’t Send Faster-Than-Light Signals
A perfectly rigid rod cannot send faster-than-light (FTL) signals because no such rod exists. Every real material transmits mechanical disturbances at…
