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Fuel consumption generally increases with speed due to greater hydrodynamic resistance. While the exact relationship can vary based on the vessel's design, a common rule of thumb is that fuel consumption increases by the cube of the speed ratio. Therefore, if the vessel burns 8 tons per hour at 15 knots, it could burn approximately 10 tons per hour at 18 knots, depending on specific factors. For precise calculations, a vessel's fuel consumption curve would be needed.
watt (w) means joules per second. kW (kilowatts) means thousands of joules per second. Multiply that by 3600 to get the joules used per hour.
how many envelope can be stuffed in an hour
Ten.