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If a comet with this speed fell to the Earth it would gain another 63 MJ/kg, yielding a total of 2655 MJ/kg with a speed of 72.9 km/s. Since the equator is moving at about 0.5 km/s, the impact speed has an upper limit of 73.4 km/s, giving an upper limit for the specific energy of a comet hitting the Earth of about 2690 MJ/kg.
2.80 grams/mile (1.75 g/km) 77.1 pounds (35.0 kg) Carbon monoxide 20.9 grams/mile (13.06 g/km) 575 pounds (261 kg) NO x: 1.39 grams/mile (0.87 g/km) 38.2 pounds (17.3 kg) Carbon dioxide - greenhouse gas 415 grams/mile (258 g/km) 11,450 pounds (5,190 kg)
TNT equivalent is a convention for expressing energy, typically used to describe the energy released in an explosion.The ton of TNT is a unit of energy defined by convention to be 4.184 gigajoules (1 gigacalorie), [1] which is the approximate energy released in the detonation of a metric ton (1,000 kilograms) of TNT.
He also noted that the tin had increased in weight and that increase was the same as the weight of the air that rushed back in. This and other experiments on combustion were documented in his book Sur la combustion en général , which was published in 1777. [ 19 ]
After several months, Chabaneau succeeded in producing 23 kilograms of pure, malleable platinum by hammering and compressing the sponge form while white-hot. Chabeneau realized the infusibility of platinum would lend value to objects made of it, and so started a business with Joaquín Cabezas producing platinum ingots and utensils.
The abundance of ytterbium in the Earth's crust is about 3 mg/kg. [ 13 ] As an even-numbered lanthanide, in accordance with the Oddo–Harkins rule , ytterbium is significantly more abundant than its immediate neighbors, thulium and lutetium , which occur in the same concentrate at levels of about 0.5% each.
Agriculture encompasses crop and livestock production, aquaculture, and forestry for food and non-food products. [1] Agriculture was a key factor in the rise of sedentary human civilization, whereby farming of domesticated species created food surpluses that enabled people to live in the cities.
A 5 kg mass of 239 Pu contains about 12.5 × 10 24 atoms. With a half-life of 24,100 years, about 11.5 × 10 12 of its atoms decay each second by emitting a 5.157 MeV alpha particle. This amounts to 9.68 watts of power.