You want to design an experiment to compare the effectiveness of pepcid ac tablets and alka-seltzer tablets. which of the following facts would be least likely to complicate your experiment and the analysis of your results? a) pepcid ac and alka-seltzer tablets contain different concentrations of the antacid drug. b) pepcid ac and alka-seltzer tablets contain different ingredients. c) the recommended dosage for pepcid ac and alka-seltzer tablets is different. d) pepcid ac and alka-seltzer tablets are sold in different countries throughout the world.

Electromagnets coils of wire paper clips picked up 10 3 15 6 20 9 25 12 ms. owens' class was studying magnets. ms. owens showed her students how to make an electromagnet using a nail, a d-cell battery, and plastic coated wire. the students wrapped the wire around the nail and then attached the ends to the battery. when they were finished, they tested their magnets by investigating how many paperclips their magnets could pick up. they also tested whether they could increase the strength of their electromagnets by using more coils of wire. they recorded the class average of their results in the data table seen here. ms. owens asked her students to graph their data in a line graph. how should the students label the x-axis on their line graph? a) size of battery b) number of paper clips c) number of coils of wire d) strength of electromagnet