Explain how potential and kinetic energy are at play when we talk about Newton’s second law of motion?

The horizontal blue line through the middle of the lens is called the optical axis. as the lamp is moved above or below the axis, keeping the horizontal distance to the center of the lens constant, how does the horizontal distance from the lens to the image change?

How many electrons does each element require in its valence shell to become stable?

Why are nonmetals more likely to react with eachother by sharing electrons