Students perform an experiment to collect data that that can be used to determine the density of an unknown liquid. they have a tall cylinder containing the liquid and some cubes of different sizes but the same known mass mthat all sink in the liquid. they only have a meterstick and a stopwatch to take measurements (a) describe a procedure the students could use to collect the data needed to create a graph that can be used to determine the density of the budincluding the measurements to be taken and any steps to reduce experimental uncertainty

No because a circle or pie graph usually shows percentages you'd need a line graph

stands for electromotive force and it is measured in volts. despite its name, it is not actually the force in the sense of being a "pushing" or "pulling" (not measured in newtons).an equation that relates emf,  ℰ,  to a battery's terminal voltage, v, current, i, and internal resistance, r, is    ℰ = v + irin this case, the emf can be interpreted as a voltage—a difference in electric potential.i would not say that it would be considered an energy. if emf can be defined as the energy/work per a unit charge from a battery or other electric source, then it is not strictly energy.

Do you still need with this