Ineed with this question what is the difference between speed and velocity? a) velocity describes speed with direction. b) there is no difference. c) velocity describes direction with position. d) velocity is used in space; speed is used on 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.

Give one example to show that when substances are mixed,it may result in a chemical or a physical change depending on the conditions.

A14 kg rock starting from rest free falls through a distance of 5.0 m with no air resistance. find the momentum change of the rock caused by its fall and the resulting change in the magnitude of earths velocity. earth mass is 6.0 * 10^24 kg. show your work assuming the rock earth system is closed.