a substance dissolves in water by breaking up into smaller pieces. these pieces of the same
substance spread throughout the water. this process is known as

Modern physics a photon emitted from an excited hydrogen atom has an energy of 3.02 electron volts. which electron energy-level transition would produce this photon? a. n=1 to n=6 b. n=2 to n=6 c. n=6 to n=1 d. n=6 to n=2 i chose b but the correct answer is d can someone tell me why? and what's the difference?

Which lists the organs in the correct order as food passes from the mouth to anus?

The ph is the a. independent variable b. the dependent variable c. control group