Respostas

2014-02-18T15:10:32-03:00
Resposta

1

V = 330m/s
F = 2000Hz

V = y.F
330 = 2000y
2000y = 330
y = 330/2000
y = 0,165 metros

2

n = 1000
T = 20s

F = n/T
F = 1000/20
F = 50Hz