A 1.0 cm2 cross-sectional area steel bar is heated up such that its length extends by by 0.1 mm. To extend a 2.0 cm2 cross-sectional area steel bar by 0.1 mm, it must experience a temperature change __________ the temperature change of the 1.0 cm2 cross-sectional area steel bar. (The bars have the same length.)
A. smaller than.
B. the same as.
C. larger than.
D. (Not enough information is given.)
Answer:B
A 1.0 cm2 cross-sectional area steel bar is heated up such that its length extends by by 0.1 mm. To extend a 2.0 cm2 cross-sectional area steel bar by 0.1 mm, it must experience a temperature change __________ the temperature change of the 1.0 cm2 cross-sectional area steel bar. (The bars have the same length.)
A. smaller than. B. the same as. C. larger than. D. (Not enough information is given.)