Next to hydrogen and oxygen, what are the two most abundant elements in the ocean water?

a. potassium and magnetism

b. sodium and magnetism

c. chlorine and potassium

d. sodium and chlorine

What is a carrier wave and how does it affect what you hear on the radio

What would be the radius of the earth if it had its actual mass but had the density of nuclei? express your answer to two significant figures and include the appropriate units.

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=?