The length of a metal rod after heating is 2.00096 m. Which of the following is the new length?

• A. 2.00050 m
• B. 2.0010 m
• C. 2.00096 m
• D. 2.0020 m

Answer: (C)

Heating a rod causes it to expand, but when a problem already gives the length after heating, that value is the new length. Here, the rod’s length after heating is 2.00096 m, so the new length is 2.00096 m. The other options would correspond to different post-heating lengths that aren’t stated in the problem.