An aluminum bar (linear expansion coefficient 2.3×10–5 K–1) has a length of 0.500 m, and a cross-sectional area of 4.0×10–4 m2 at room temperature (20.0° C). As the temperature of the bar is raised, its __________ will increase.
A. length.
B. cross-sectional area.
C. (Both of the above choices.)
D. (Neither of the above choices.)
Answer:C
An aluminum bar (linear expansion coefficient 2.3×10–5 K–1) has a length of 0.500 m, and a cross-sectional area of 4.0×10–4 m2 at room temperature (20.0° C). As the temperature of the bar is raised, its __________ will increase.
A. length. B. cross-sectional area. C. (Both of the above choices.) D. (Neither of the above choices.)