**Answer :** As we know 0° C =273.16 K. For convenience, we take 0° C = 273 K after rounding off the decimal.

To change a temperature on the Kelvin scale to the Celsius scale we have to subtract 273 from the given temperature

(a) 293 K = 293-273 = 20°^{} C

(b) 470 K = 470-273 = 197°^{ }C

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This is an answered question from Chapter 1. MATTER IN OUR SURROUNDINGS of CBSE Class 9th Science

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