Question #2* 2) Something that vibrates 700 times every 3.5 seconds, But you hear it at a frequency of
196Hz
a) What is the frequency of the source.
b) is the source moving toward or away from you?
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3) If light that normally travels at 299,000,000m/s only travels at 290671141 m/s

Consider a uniformly charged ring in the xy plane, centered at the origin. the ring has radius a and positive charge qdistributed evenly along its circumference. a)what is the direction of the electric field at any point on the z axis? . b)what is the magnitude of the electric field along the positive z axis? use k in your answer, where k=14πϵ0. d)the ball will oscillate along the z axis between z=d and z=−d in simple harmonic motion. what will be the angular frequency ω of these oscillations? use the approximation d≪a to simplify your calculation; that is, assume that d2+a2≈a2. express your answer in terms of given charges, dimensions, and constants