What is the magnitude of the approximate average force exerted by the ground on your feet during the time when your knees are bending? (The force of the Earth is only = 539 N; you notice the unusually big force on your feet.)

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.