Odpowiedź :
Odpowiedź:
d=5m
t=120s
n=60
f=n/t
f=60/120s
f=0,5Hz
d=λ/2
λ=5m*2
λ=10m
v=λ*f
v=10m*0,5Hz
v=5m/s
[tex]Dane:\\\frac{\lambda}{2} = 5 \ m \ \ \rightarrow \ \ \lambda = 10 \ m\\t = 2 \ min = 120 \ s\\n = 60\\Szukane:\\v = ?\\\\\\T = \frac{t}{n} = \frac{120 \ s}{60} = 2 \ s\\\\v = \frac{\lambda}{T}\\\\v = \frac{10 \ m}{2 \ s}\\\\\boxed{v = 5\frac{m}{s}}[/tex]