Question

Convert the temperature of the coldest area in a freezer, −10 °F, to kelvin.

Temperature:______K

a)249.1K

b)249.6K

c)248.8K

d)250.1K

Answer 1

To convert -10 °F to Kelvin, we first convert it to Celsius, resulting in -23.333 °C, and then add 273.15 to get the temperature in Kelvin, which is 249.8K after rounding. The correct option is c.

Step-by-step explanation:

To convert the temperature of −10 °F to Kelvin, we first need to convert Fahrenheit to Celsius and then Celsius to Kelvin. According to the conversion formulas, the first step is to use °C = 0.555 x (°F - 32).

Converting −10 °F to Celsius:

• °C = 0.555 x (−10 - 32)
• °C = 0.555 x −42
• °C = −23.333

Now we convert Celsius to Kelvin using the formula TK = °C + 273.15:

• TK = −23.333 + 273.15
• TK = 249.817

When rounded to one decimal place, the temperature in Kelvin is 249.8K, which corresponds to option c). The correct option is c.