What is the wavelength of a wave? the amount of time that occurs in one full cycle the distance between two crests of a wave the size of the disturbance the amount of cycles that occur in a given time

Which of the following situations is impossible? a) an object has velocity directed east and acceleration directed east. b) an object has zero velocity but non-zero acceleration. c) an object has constant non-zero velocity and changing acceleration. d) an object has velocity directed east and acceleration directed west. e) an object has constant non-zero acceleration and changing velocity.