Question #6626e

1 Answer
Oct 27, 2015

Answer:

#-28^@"C"#

Explanation:

To go from temperature expressed in degrees Celsius, #^@"C"#, to temperature expressed in Kelvin, #"K"#, you need the following conversion factor

#"t K" = "t"^@"C" + 273.15#

In simple terms, the origin of the Kelvin scale, #"0 K"#, also called absolute zero, is set at #-273.15^@"C"#. Temperatures expressed in Kelvin cannot be lower than #"0 K"#, so always make sure that you don't have negative temperatures in Kelvin.

http://www.howequipmentworks.com/international_units/

Now, since you can go from degrees Celsiu to Kelvin by adding #273.15#, it follows that you can go from Kelvin to degrees Celsius by subtracting #273.15#

#"t"^@"C" = "t K" - 273.15#

In your case, a temperature of #"245 K"# would correspond to

#"t"[""^@"C"] = "245 K" - 273.15 = -28.15^@"C"#

You need to round this off to

#"t"[""^@"C"] = color(green)(-28^@"C")#