In the graph, which machine has the greatest mechanical advantage?

Look at the potential energy diagram for a chemical reaction. which statement correctly describes the energy changes that occur in the forward reaction?

Which is special about a dc circuit ? a. it has both series and parallel components b. it has only series or only parallel components c. charge moves in a single direction d. charge moves back and forth quickly

Amira pulls a 3 pound wagon 4 feet. how much work has she done?