1. Why is the theory that all things are made up of atoms a theory and not a fact?

How is chemical activity used to separate copper from its ore?

All incident and reflected rays obey which law?

A book with a mass of 1.5kg was lifted 2 meters. How much work was done

What tree things can happen to the radiation that earth receives from the sun

Fossils found in lower rock layers are generally more what than fossils found in rock layers closer to the surface

A ramp with a mechanical advantage of 8 lifts objects to a height of 1.5 meters how long is the ramp

Sodium, atomic number 11, forms an ionic bond with an atom of an unknown element. What is one possible choice for the ther element in the compound?

A ship leaves the island of Guam and sails a distance 255 km at an angle 49.0 o north of west. Part A: In which direction must it now head so that its resultant displacement will be 125 km directly east of Guam?

What is the molecular geometry of a methane (CH4) molecule?

Why do scientist use radioactive decay to figure out how old stuff is