If a group of workers can apply a force off 500 newtons to move a crate 20 meters, what amount of work will they have accomplished

Identify the theory that can be used to explain each phenomenon. answers diffraction: wave theory interference: wave theory reflection: both particle and wave theories refraction: both particle and wave theories

If the chemical properties of a substance remain unchanged and appearance or shape of a substance changes it is called a ?

What is the orbital period of a spacecraft in a low orbit near the surface of mars? the radius of mars is 3.4×106m.