To change Celsius into Kelvin you must:
AAdd 373
BAdd 473
CAdd 273
DAdd 173
Answer & Solution
Correct answer: C. Add 273
1. The two scales differ by a fixed offset.
2. Zero Celsius is 273 K after rounding.
3. You add 273.
_Source: NCERT Class 9 Science, Ch 1 'Matter in Our Surroundings'_
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