A speedboat increases its speed from 14.5 m/s to 29.3 m/s in a distance of 172 m. (a) Determine the acceleration (in m/s/s) of the speedboat.
(b) Determine the time (in s) over which this acceleration occurs.

What are two different ways you could find the value of a? explain these methods.

Ihave a density of 1.61g/cm^3 and a mass of 28g. find the missing value

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