- Physics Help .. Multiple Questions?

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How does astronomy relate to tsunamis? Please answer in 10 sentences? What is the Doppler effect, and why is it important to understand? I am in the laboratory reference frame, find the orthogonal basis unit
vectors? If I know the standard deviation, mean and individual score, how many standard deviations is the individual score from the mean? A suitcase with a mass of 2 kg has a weight of 18N on a particular planet. What is the acceleration due to gravity on that planet.?