Odpowiedź:
zadanie 1: = 2 m/s
zadanie 2: ≈ 7.14 Hz
Wyjaśnienie:
zadanie 1:
[tex]\lambda = 400 \text{ cm} = 4 \text{ m}\\T = 2 \text{ s}\\\\v = \frac{\lambda}{T} = \frac{4 \text{ m}}{2 \text{ s}} = 2\frac{\text{m}}{\text{s}}[/tex]
zadanie 2:
[tex]v = 2.5 \frac{\text{m}}{\text{s}}\\\lambda = 35 \text{ cm} = 0.35 \text{ m}\\\\f = \frac{v}{\lambda} = \frac{2.5 \frac{\text{m}}{\text{s}}}{0.35 \text{ m}} \approx 7.14 \text{ Hz}[/tex]
