# physics

posted by
**amanda and leah** on
.

NOTE: the formula for converting the

CHANGE in temperature is NOT the same

as simply converting the temperature!

A bridge is made with segments of concrete 81 m long (at the original temperature). If the linear expansion coeﬃcient is 1.2 × 10−5(◦C)−1, how much spacing is needed to allow for expansion for an increase in temperature of 61◦F?

Answer in units of cm