An environmental chemist measures the volumetric energy density of a biogas sample under standard conditions using a calorimeter calibrated in British Thermal Units per cubic foot (Btu/ft3\text{Btu/ft}^3Btu/ft3).
The energy density of the sample is recorded as 31.8±1.2 Btu/ft331.8 \pm 1.2\text{ Btu/ft}^331.8±1.2 Btu/ft3.
Convert this volumetric energy density into megajoules per cubic metre (MJ/m3\text{MJ/m}^3MJ/m3), ensuring your converted value is given to 3 significant figures. Coordinate the absolute uncertainty in the converted value, giving it to 1 significant figure.
Use the following conversion factors:
