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Tankers move approximately 2.0 billion metric tons (2.2 billion short tons) of oil every year. [ 4 ] [ 5 ] Second only to pipelines in terms of efficiency, [ 5 ] the average cost of transport of crude oil by tanker amounts to only US$5 to $8 per cubic metre ($0.02 to $0.03 per US gallon).
If the pilot were suddenly to pull back on the stick and make his plane accelerate upwards at 9.8 m/s 2, the total g‑force on his body is 2 g, half of which comes from the seat pushing the pilot to resist gravity, and half from the seat pushing the pilot to cause his upward acceleration—a change in velocity which also is a proper ...