What is efficiencywhat is the formula of mechanical advantage and velocity ratio of labour

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.

Select the three ways that the parallel-plate capacitor differs from a car battery.

In which type of system is power held solely by the central government and not shared with regional governments? group of answer choices federal unitary confederate oligarchic