The speed of light in a vacuum is constant. If the frequency of a light wave increases, what happens to the wavelength of the light?
A. It remains constant.
B. It increases.
C. It decreases.
D. The frequency of a light wave cannot increase.

The answer to that would be magnesium

Because you ate playdough

Answerδh > 0explanationc₆h₆  (s)  → c₆h₆ (l)if you are changing it from a solid to a liquid, you are pretty much melting the solid. this requires heat energy. therefore, the reaction is endothermic (takes in energy); the system enthalpy increases as the reaction proceeds: δh > 0.