The photoelectric effect describes when light shines on a piece of metal, and the metal releases electrons. Which model of light
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Room temperature water, 25° C, is in liquid state. With an increased temperature, the water molecules within the container begin to break their hydrogen bonds, and releasing heat in an exothermic reaction. As water reaches 100° C sea level, its liquid state becomes vapor and is emitted as steam. It can be explained as well by as its boiling point illustrated here.
