To convert from substance A to substance B, you must always go through what?

At room temperature what happens to the average kinetic energy of the molecules of a solid, liquid, and a gas

Water is important for the of cells. a: size, shape, and temperature b: temperature, color, and odor c: color, odor, and size d: shape, temperature, and color

The blackbody curve for a star name zeta is shown below. what is the peak wavelength for this star ?