Worksheet-Thermodynamics 1. Circle all true statements: a) 40K corresponds to -40°C. b) Water at 90°C is warmer than water at 202°F. c) Temperature differing by 25 on the Fahrenheit scale must differ by 45 on the Celsius scale. d) Temperatures which differ by 10 on the Celsius scale must differ by 18 on the Fahrenheit scale. e) 0ºF corresponds to -32°C. 2. At what Kelvin temperature would the Celsius and Fahrenheit readings be equal? 3. A linear accelerator contains hundreds of brass disks tightly fitted into a steel tube. The coefficient of linear expansion of the brass is 2x10 K. The system was assembled by cooling the disks in dry ice (- 57°C) to enable them to just slide into the close-fitting tube. If the diameter of the brass disk is 80mm at 43°C, what is its diameter in the dry ice?