3. Suppose that a car traveling to the west (-x direction) slows down uniformly as it ap- proaches a traffic light. Which statement concerning its acceleration must be correct? (a) Its acceleration is positive. (c) Its acceleration is zero. (b) Its acceleration is negative. (d) Its acceleration is decreasing.

Select the best definition for wavelength. the height of an oscillating electromagnetic wave the rate at which electromagnetic waves oscillate. the distance between two crests of an electromagnetic wave. the oscillations of electric and magnetic fields select the best definition for frequency. the oscillations of electric and magnetic fields. the height of an oscillating electromagnetic wave. the distance between two crests of an electromagnetic wave. the rate at which electromagnetic waves oscillate