Final answer:
To convert temperature from Celsius to Kelvin, add 273.15 to the Celsius temperature. Thus, for the first equation the correct form is T = 36 + 273. For the second question, to convert from Kelvin to Celsius, subtract 273 from the Kelvin temperature, making the correct equation T = 400 - 273.
Step-by-step explanation:
The relationship between the temperature in Kelvin (K) and Celsius (°C) is given by the equation TK = Tc + 273.15, where TK is the temperature in Kelvin and Tc is the temperature in degrees Celsius. Kelvin is the SI unit of temperature and is used in sciences as an absolute temperature scale, meaning 0 K is the lowest possible temperature, called absolute zero, where all molecular motion ceases.
To answer the first part of your question, the correct equation to convert a temperature from °C to K is: T = ∅ + 273. So, the correct option would be (a) T = 36 + 273.
For the second part, to find the temperature in °C when the absolute temperature is 400 K, we need to subtract 273 from the Kelvin temperature. Therefore, the correct formula is T = TK - 273. So, the correct option for converting 400 K to °C is (b) T = 400 - 273.