Pound-mass (lbm) is a unit of mass that was used in the UK, where 1 lbm = 0.4539 kg. Suppose you're measuring in lbm with a device with an uncertainty of 2x10-04 kg. What is the percent uncertainty of the device in pound-mass (lbm)?
Based on the previous percent uncertainty (0.044%), what mass, in pound-mass, has an uncertainty of 1 kg when converted to kilograms?
