A sample warms from 0.0 degrees Celsius to 40.0 degrees Celsius. What is 40.0 degrees Celsius in degrees Fahrenheit?

1. Each Celsius degree corresponds to 1.8 Fahrenheit degrees, and the two scales are offset by 32 degrees at the freezing point of water. 2. Multiply 40.0 by 1.8 to get 72.0. 3. Add the 32-degree offset: 72.0 + 32 = 104. 4. So 40.0 degrees Celsius converts to 104 degrees Fahrenheit. 5. A reader who forgets the 32-degree offset and stops after scaling would wrongly pick 72 degrees Fahrenheit. _Source: OpenStax Physics (CC BY 4.0), Ch 11 "Thermal Energy, Heat, and Work", section 11.1 Temperature and Thermal Energy_