Odpowiedź :
1.
Dane:
t = 4s
n = 200
Szukane:
f = ?
T = ?
Wzór:
[tex]f = \frac{n}{t} [/tex]
[tex]T = \frac{1}{f} [/tex]
Obliczenia:
[tex]f = \frac{200}{4} = 50Hz[/tex]
[tex]T = \frac{1}{50Hz} = \frac{1}{50} s[/tex] = 0,02s
2.
Dane:
f = 100Hz
V = 300m/s
Szukane:
λ = ? *
Wzór:
[tex] \lambda = \frac{v}{f} [/tex]
Obliczenia:
[tex] \lambda = \frac{300}{100} = 3m[/tex]
*λ - długość fali (lambda)
1.
[tex]Dane:\\n = 200\\t = 4 \ s\\Szukane:\\T = ?\\f = ?\\\\Rozwiazanie\\\\T = \frac{t}{n}\\\\T = \frac{4 \ s}{200}\\\\\boxed{T = 0,02 \ s}\\\\\\f = \frac{1}{T}\\\\f = \frac{1}{0,02 \ s}\\\\\boxed{f = 50 \ Hz}\\\\\\lub\\\\f = \frac{n}{t}\\\\f = \frac{200}{4 \ s}\\\\f = 50 \ Hz[/tex]
2.
[tex]Dane:\\f = 100 \ Hz = 100 \frac{1}{s}\\v = 300\frac{m}{s}\\Szukane:\\\lambda = ?\\\\Rozwiazanie\\\\\lambda = v\cdot T\\\\ale \ \ T = \frac{1}{f}, \ zatem:\\\\\lambda = \frac{v}{f}\\\\\lambda = \frac{300\frac{m}{s}}{100\frac{1}{s}}\\\\\boxed{\lambda = 3 \ m}[/tex]