Question

Temperature of the core of earth is equal to 3727$^{\circ}$ C. This temperature in kelvins is equal to:
A. 4000 K
B. 3727 K
C. 3454 K
D. none of the above

Answer 1

Hint: The given temperature in Celsius has to be converted into Kelvin, which is considered as a standard unit (S.I.) for measuring temperature. Use the simple conversion formula to obtain the required value in K.

Formula used:
In order to convert temperature given in Celsius scale to temperature in Kelvin we use the following formula:
Temperature in Kelvin = Temperature in Celsius + 273.

Complete step by step answer:
273 K is the temperature that marks 0$^{\circ}$ C on Celsius scale. Therefore, to convert the temperature from Celsius scale to Kelvin scale, we just simply add 273 to the temperature in Celsius.

We are given that the temperature of core is 3727$^{\circ}$ C we convert it to Kelvin as:
$T = 3727 + 273 = 4000 K$

Therefore, the temperature in Kelvin is 4000 K, which means the correct answer is option (A).

Additional information:
Some other units for temperature are Celsius (centigrade) and Fahrenheit.
We prefer these units over Kelvin in our daily use. Centigrade is another name for Celsius used in olden times, which in Latin means 100 degrees as the boiling point of water is marked as 100 degrees. Celsius is the easiest temperature scale of all as it puts a freezing point of water as 0$^{\circ}$ C and boiling point of water as 100$^{\circ}$ C. It has been named after Swedish scientist Andres Celsius (1701 -1744).

Note:
Kelvin is a standard unit for temperature, most formulas used temperature in Kelvin so while performing any calculations one must first convert any given temperature in Celsius to Kelvin. Some formulas although use temperature in Celsius so this point should be noted always while dealing with formulas containing temperature.