ustin, with a mass of 45 kg, is going down an 8.0-m-high water slide. He starts at rest, and his speed at the bottom is 12 m/s. Part A How much thermal energy is created by friction during his descent

Aflute player hears four beats per second when she compares her note to a 523 hz tuning fork (the note c). she can match the frequency of the tuning fork by pulling out the “tuning join” to lengthen her flute slightly. what was her initial frequency?