Cuesta College, San Luis Obispo, CA
Cf. Giambattista/Richardson/Richardson, Physics, 2/e, Problems 13.14, 13.15
A glass container is filled to the brim with a liquid when the system is at 40° C. After the system is cooled to 15° C, the liquid level is slightly below the top of the container. There are no phase changes. Which material (glass or liquid) has a larger coefficient of volume expansion? Explain your answer using the properties of temperature and thermal expansion.
Solution and grading rubric:
Correct. Argues that since liquid contracted more than the glass, then the liquid must have a greater volume expansion coefficient than the glass.
As (p), but argument indirectly, weakly, or only by definition supports the statement to be proven, or has minor inconsistencies or loopholes.
Nearly correct, but argument has conceptual errors, or is incomplete.
Limited relevant discussion of supporting evidence of at least some merit, but in an inconsistent or unclear manner.
Implementation of ideas, but credit given for effort rather than merit.
y: Irrelevant discussion/effectively blank.
Irrelevant discussion/effectively blank.
Sections 70854, 70855
Exam code: finalB0xs
p: 37 students
r: 8 students
t: 0 students
v: 1 student
x: 1 student
y: 1 student
z: 0 students
A sample "p" response (from student 3737):
A sample "p" response (from student 4242):