How long after the initial metrication would it take for food companies to
start using "joules/kilojoules" instead of "calories?" (They would use
kilojoules and not just joules, correct?) Even if people don't use centimeters
or kilograms in their daily lives they've at least heard of them. But I don't
think anyone outside of the scientific community has heard of the "joule."
So would calories stay or would those be changed as well? Do they use
joules/kilojoules on food packages in metric countries?
