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Fyzika

Sborový soprán může zpívat tón c3 o kmitočtu přibližně 1 kHz; vlnová délka takového tónu ve vzduchu činí přibližně

Sborový soprán může zpívat tón c³ o kmitočtu přibližně 1 kHz; vlnová délka takového tónu ve vzduchu činí přibližně