The mechanical advantage of a pulley system is determined by . A. counting the number of pulleys in the pulley system B. dividing the number of pulleys by the length of the rope C. dividing the length of the rope by the number of pulleys D. counting the number of rope segments supporting the load

Which of the following observations indicates that there is a small, dense, positively charged part in the center of an atom? some uncharged particles are scattered by a gold foil. all uncharged particles are attracted towards a gold foil. all positively charged particles pass straight through a gold foil. some positively charged particles bounce back from a gold foil.

Anthracite is so hard and pure it is also referred to as a renewable resource metamorphic rock hot bituminous coal dirty fuel

How are isotopes of the same element alike?