Mrs Westinghouse says the speed of sound "travels at a constantly diminishing rate of speed", which makes no sense; then she says "the fastest rate on record is 11,463 feet per second". The speed of sound in the atmosphere at sea level is one tenth that, about 1100 feet per second. It is not something which has any "record" value.

Film

Edison - L'uomo che illuminò il mondo (2018)

Persone

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