Answer:
D. Wavelength
Explanation:
An infrared (IR) and ultraviolet (UV) wave propagating through a vacuum must have the same wavelength.
M/s, km/h, and mph are all used to measure these quantities
Energy is "the ability to do work". Energy is how things change and move. It takes energy to cook food, to drive to school, and to jump in the air. Different forms of Energy. Energy can take a number of different forms.
Before 7 after 9. A pH smaller than 7 indicates acidity with 0 being completely acidic. A pH greater than 7 shows alkalinity with 14 being completely alkaline. 7 is neutral. Since NaOH is alkaline, adding it to a neutral substance would increase the pH and it would increase from 7 to 9.