# During very vigorous exercise, the body's temperature can go as high as 40°C. What would this temperature read on the Kelvin scale?

The temperature would be $\text{313 K}$.
In order to convert the Celsius temperature to Kelvins, add $273.15$ to the Celsius temperature. The Kelvin scale does not use a degree symbol.
${40}^{\circ} \text{C" + 273.15="313 K}$ (rounded to a whole number)