What is the equation for density? d = d = m over v. d = d = v over m. d = d = m over v squared. d = d = one-half m v squared. mv2

The difference between a red shift and a blue shift has to do with wavelength frequency. t or f

In positive numbers less than 1, the zeros between the decimal point and a non-zero number are blank significant

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