Put all of the above household items in order from lowest to highest pH.

When a book falls from a shelf to the ground without anyone pushing on it, no work is done on the book. true or false

With i really need the correct answer!

Why can blue light and yellow light combine to produce white light? question 17 options: they are both primary colors of light. they absorb each other's wavelengths. because blue, yellow, and white are primary colors. they are complementary colors of light.