An ocean wave has a wavelength of 15 meters and is moving at 2.5 m/s. what is the frequency

Which describe reflection? check all that apply. light bounces off a boundary.

What color of light must blue light mix with to create white light? a. yellow b. white c. blue d. green

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