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 0.14 kg pinecone falls 17m to the ground, where it lands with a speed of 12 m/s. a) How much work was done on the pinecone by air resistance? Use two significant figures.
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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.)
An electron has a velocity of 1.81×104 m/s (in the positive x direction) and an acceleration of 2.11×1012 m/s2 (in the positive z direction) in uniform electric and magnetic feilds. If the electric field has a magnitude of 17.9 N/C (in t
Assume that it takes a college student an average of 5 minutes to find a parking spot in the main parking lot. Assume also that this time is normally distributed with a standard deviation of 2 minutes.
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