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1deanxcas1
06.05.2021 •
Physics
Qué esperas que pase cuando las partículas alfa de poca energía se acerquen a un núcleo con muchos protones?
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Ответ:
So 0 dB does not mean no sound, it means a sound level where the sound pressure is equal to that of the reference level. This is a small pressure, but not zero. It is also possible to have negative sound levels: - 20 dB would mean a sound with pressure 10 times smaller than the reference pressure, i.e. 2 μPa.