The assistant adjusts the tension in the same piano string, and a beat frequency of 4.00 Hz is heard when the note and the tuning fork are struck at the same time. (a) Find the two possible frequencies of the string. flower = Hz fhigher = Hz (b) Assume the actual string frequency is the higher frequency. If the piano tuner runs away from the piano at 3.59 m/s while holding the vibrating tuning fork, what beat frequency does he hear? f = Hz (c) What beat frequency does the assistant on the bench hear? Use 343 m/s for the speed of sound. f = Hz

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Electromagnetic Waves

Electromagnetic waves are waves that consist of magnetic field and electric field components perpendicular to each other. These field components are also perpendicular to the direction of propagation of the wave.