Evaluate the important of radioactive isotopes in determining the age of earth

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.

Most short-period comets do not have randomly oriented orbits because

In which of the following is positive work done by a person on a suitcase