When an object is burning, two atoms of oxygen (in the air) combine with one atom of carbon (from the substance burning). this produces three atoms that combine to form carbon dioxide gas. explain how the law of conservation of matter applies to this reaction.?

Ais a machine that makes work easier when a single force is applied. a simple machine b compound machine c endangered machine d complex machine

You are driving to the grocery store at 20 m/s. you are 110m from an intersection when the traffic light turns red. assume that your reaction time is 0.50s and that your car brakes with constant acceleration. how far are you from the intersection when you begin to apply the brakes? what acceleration will bring you to rest right at the intersection? how long does it take you to stop after the light changes? the known values: vi=20m/s xi=110m t=.50s vf=0m/s xf=0m a=?

Only 3% of the water on earth is usable by humans. even though that 3% is through the water cycle, we still need to be careful not to waste water.