Why would you not want to use a coefficient of 0 to balance any reaction? PLEASE HELP!!!

What color of light must blue light mix with to create white light? a. yellow b. white c. blue d. green

When you push downward on a book at rest on a table, you feel an upward force. does this force depend on friction? defend your answer.

Pl asaaap ! match the term to the correct description. a type of wave that transfers energy where the particles in the medium move perpendicular to the direction in which the energy is traveling. a type of wave that transfers energy where the particles in the medium move parallel to the direction in which the energy is traveling. movement that is back and forth, like an equal sign = a type of wave that transfers energy where the particles in the medium move in a circle motion while the energy travels left or right. movement that is like a t transfers energy from one location to another 1. wave 2. parallel movement 3. perpendicular movement 4. transverse wave 5. longitudinal wave 6. surface wave