Answer:
B) 60 hertz and it travels at 30 m/s
Explanation:
The frequency of a wave corresponds to the number of complete vibrations per second. The wave in this problem has 60 vibrations per second, so its frequency is
[tex]f=\frac{60 vibrations}{ 1 s}=60 Hz[/tex]
The speed of the wave instead is given by the distance travelled divided by the time taken. In this problem:
d = distance travelled = 30 m
t = time taken = 1 s
So, the speed of the wave is
[tex]v=\frac{d}{t}=\frac{30 m}{1 s}=30 m/s[/tex]
so, the correct answer is
B) 60 hertz and it travels at 30 m/s
