Humber Admissions Practice Test

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What is the formula to convert Celsius to Kelvin?

K = C + 273
K = C - 273
K = C * 273
K = C / 273

The correct answer is: K = C + 273

To convert Celsius to Kelvin, the formula used is K = C + 273. This equation is derived from the relationship between the two temperature scales. The Kelvin scale is an absolute temperature scale, meaning it starts at absolute zero, the point at which all molecular motion ceases. In this conversion, you start with a temperature in degrees Celsius and add 273. This addition accounts for the difference in the zero points of the two scales. For instance, 0 degrees Celsius (the freezing point of water) is equal to 273.15 Kelvin. However, for simplicity, the formula typically uses 273 as an approximation in educational contexts. The other options do not accurately reflect the relationship between Celsius and Kelvin. The second option suggests subtracting 273, which would incorrectly lower the temperature instead of converting it. The third and fourth options imply multiplying or dividing by 273, which does not apply in this conversion as the scaling between Celsius and Kelvin involves a simple additive adjustment rather than a multiplicative one.