On Thursday 23 March 2006 15:54, Pat Naughtin wrote: > > . . . Non-renewable fuels used to generate electricity include black coal > > (53,576 kt), brown coal (65,075 kt), and natural gas (291,372 TJ). > > Hydro-electricity was the main renewable source of electricity, and in > > 2001-02, 15,567 GWh of hydro-electricity were produced (table 1).
For coal and oil they could give both joules and tonnes bzw. liters, since those are different physical quantities, and one may want to visualize the volume of oil as well as compare energies. Without the joules I can't even compare the energy of black coal to brown coal. But they should definitely list all the energies in the same unit, and not expect anyone to remember whether to multiply or divide by 3.6. > As a mathematician you might like to figure how many conversion factors you > need to convert from any one of the 68 words used to describe energy and > any of the others. The reference: > http://mathworld.wolfram.com/Factorial.html might help you but I got > lost. It's 67*34=2278. But some of those are different names for the same unit. A kilowatt second is a kilojoule, and a newton metre is a joule (when used for energy - usually it's a unit of torque). An erg is a dyne centimetre (unless it's in the Sahara). phma
