They calculate that the impact of a body 250 kilometers wide would have delivered energy equivalent to 100 billion megatons of TNT to the planet, melting exposed polar ice and injecting enough water into the atmosphere to rain out 16 meters of precipitation.
In the chaos, another object as big as Mars struck our planet, carrying energy equivalent to trillions of atomic bombs, enough to penetrate the earth.
"Barrels of oil equivalent - Boe: The energy equivalent to a Barrel of crude oil, i.e. 5.8 million Btus."
The energy equivalent of the mass discrepancy in a nucleus is called binding energy.
The half-a-kilometer deep and 200-km-wide Gulf Stream has been estimated to carry energy equivalent to burning 160 billion kilograms of coal an hour.
"If controlled nuclear fusion is achieved, it might provide an inexpensive energy source because the primary fuel, deuterium, can be extracted from ordinary water, and eight gallons of water could provide the energy equivalent to 2,500 gallons of gasoline."
Use that electricity to produce hydrogen, and the Danes would have the energy equivalent of the euro: an energy currency that can be efficiently swapped for heat or locomotion, or turned back into electricity.
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