A ball rolls from x = 10 m to x = -25m in 2.5 second. What was its average velocity?

current and voltage can both be different in different parts of a circuit so it matters where you place the ammeter and voltmete

no. bullets are macro objects. wave nature is for light waves, extremely tiny particles. if a light particle was the size of your finger, the bullet would be the size of the universe. so basically, that huge difference in size makes the wave nature of matter insignificant.