21. REASONING The formula K = 5 (F - 32) + 273.15
converts temperatures from Fahrenheit Fto Kelvin K.
a. Solve the formula for F.
b. The freezing point of water is 273.15 Kelvin.
What is this temperature in Fahrenheit?
C. The temperature of dry ice is – 78.5 °C.
Which is colder, dry ice or liquid nitrogen?