Math & Science ACT Workuot

Passage V

In  3   studies,    students    investigated    the thermal expansion   of  rectangular metal   rods    various lengths and materials   (see    Figure  1).

Figure  1

Using   the water   bath    shown   in  Figure  2,  the students    heated  the rods    to  different   temperatures.

Figure  2

In each trial, the rod was transferred to a water bath preheated to a particular temperature and then allowed to incubate for a set amount
of time. During the incubation process, water temperature was kept constant while the metal rods underwent thermal expansion.