The circumference of the earth at the equator is 24901mi. what is the diameter of the earth at the equator? the radius?

What is work? how much work is done to move an object 0 meters?

Two objects of different mass start from rest, are pulled by the same magnitude net force, and are moved through the same distance. the work done on object 1 is 900 j. after the force has pulled each object, object 1 moves twice as fast as object 2. how much work is done on object 2?

Sound is a disturbance that travels through a medium as a