Question

C1) If a standard 1850 USA railroad track (11.9m) was made on a hot summer day 32 °C, how long would it be on a cold night in NY -5 °C? C2) In a NY city skyscraper, there is a steel cable that is 380 m tall. If it was placed there at room temperature 20°C, and the building cooled off to 10°C in winter, how many cm would the 1st floor level be off when the elevator doors opened?

C3) Why do most solid materials expand when their temperatures increase?

Answer 1