Which green shape is the least reactive?

(Subjective is actually science)

Acar travels along a highway with a velocity of 24 m/s, west. the car exits the highway; and 4.0 s later, its instantaneous velocity is 16 m/s, 45° north of west. what is the magnitude of the average acceleration of the car during the four-second interval?

What will a positive and a negative charge do if they are separated from each other?

Which two particles are found in the center of an atom