A60-vibration-per-second wave travels 30 meters in 1 second. its frequency isa) 30 hertz and it travels at 60 m/s. b) 60 hertz and it travels at 30 m/s. c) 1800 hertz and it travels at 2 m/s.

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

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

so, the correct answer is

B) 60 hertz and it travels at 30 m/s

the answer is a)

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