In the smectic A liquid-crystalline phase, . a. the molecules are oriented in a totally random fashion b. disk-shaped molecules are aligned through a stacking of the disks in layers c. the molecules are aligned along their long axes, with no ordering with respect to the ends of the molecules d. the molecules are aligned with their long axes tilted with respect to a line perpendicular to the plane in which the molecules are stacked e. the molecules are arranged in sheets, with their long axes parallel and their ends aligned as well

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