Finding the wave frequency
1) A travelling wave train has a wavelength 0.5m, speed 20m/s. Find the wave frequency.
2) Approximately what fundamental frequency (in Hz) would you expect to hear as a result of blowing across the top of an empty 30cm high bottle?
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A professor would like to utilize the normal distribution to assign grades such that 5% of students receive A's. If the exam average is 62 with a standard deviation of 13, what grade should be the cutoff for an A? (Round your answer.)
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