I NEED HELP WILL MARK 5 STARS TO BEST ANSWER

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.

What structural formula represents 4 electrons shared between two atoms?

What is the moment of inertia i of this assembly about the axis through which it is pivoted? express the moment of inertia in terms of mr