A ton-mile is a unit of measure that represents the transport of one ton of freight over one mile. The energy associated with a ton-mile can vary based on the mode of transportation, but a rough estimate is that it takes about 0.5 to 1 megajoule to move a ton over a mile. Therefore, a ton-mile is generally equivalent to approximately 0.5 to 1 megajoule, depending on the efficiency of the transport method used.
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Those units are unrelated, and uncompatible - can't be converted. Grams / hour has units of mass / time. Joules or megajoules is a unit of energy.
mega- as a prefix to anything means 1,000,000 as in megahertz, megawatts, megajoules &c. There are 1,000,000 meters in a megameter.
1 kWH = 3.6 megajoules of energy and 1 BTU = approximately 1055 joules.1 kWH = 3412.3 BTUSo a million BTUs would be 3.4123 billion BTUs (3.4 x 109 BTU)However, this is not an exact conversion because kWH is energy exerted over time, while BTU is energy content.(see the related question)
One megajoule (MJ) is equal to 239.006 butane oxidation thermal units (BOTU). This conversion factor is based on the energy content of butane and the definition of the joule. Therefore, to convert from megajoules to BOTU, you would multiply the number of megajoules by 239.006.
"Watt" is a rate of using energy. It means "one joule per second"."One megawatt per year" means "One million joules per second per year".Clearly, it has no physical meaning.One megawatt-year is equal to roughly 31.56 megajoules. (rounded)One megajoule per year is equal to roughly 0.0317 watt. (rounded)