The testable question in a science investigation reads: “how does the size of a motor affect the speed of the vehicle? ” what is the independent variable in the question?
a) the sizes of motors
b) the brands of motors
c) the varying speeds
d) the types of vehicles

16. in a reaction that has reached equilibrium, a. the forward and reverse reactions are occurring at the same rate. b. the reactants and products are in equal concentrations. c. the forward reaction has gone further than the reverse reaction. d. there are equal numbers of atoms on both sides of the equation. e. a, b, and d are correct.