[tex]Dane:\\d = 30 \ cm = 0,3 \ m \ \ \rightarrow \ \ r = 0,15 \ m\\n = 6000\\t = 1 \ min = 60 \ s\\Szukane:\\a) \ f = ?\\b) \ v = ?\\\\Rozwiazanie\\\\a)\\f = \frac{n}{t}\\\\f = \frac{6000}{60 \ s}\\\\\boxed{f = 100 \ Hz}[/tex]
[tex]b)\\v = 2\pi rf\\\\v = 2\cdot3,14\cdot0,15 \ m\cdot100 \ Hz\\\\\boxed{v = 94,2\frac{m}{s}}[/tex]
