If a train of freight cars, each 10 meters long, rolls by you at the rate of three cars each second. What is the frequency of the train cars and the velocity?

30 m/s. speed = distance / time.

Explanation:

wavelength of a longitudinal wave is the distance between successive compressions or equivalently the distance between successive rarefactions.  30 m/s. speed = distance / time.

so you come to the correct conclusions and make the right decision based on good judgment and a clear mind and valid thought processes behind it, and not just hasty thinking and recklessness.

explanation:

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answer: they get money for not letting the president go

explanation: