With the knowledge of bill of materials (Table 3) and labor hours (Table 4), the total cost for. manufacturing the steel vessel is calculated and summarized in Table 5. Given that the steel vessel. has a storage capacity of 564 kg of CGH2, its cost is $539 per kg of stored hydrogen.
Prehistoric (Archaeological) & Historic Periods. The Prehistoric Period consists of time periods in the origin and evolution of humankind from about 2.5 million years to about 900 BCE. the Prehistoric Period is divided into the Archaeological Periods of the Stone, Bronze and Iron Ages.
The Mesozoic Era is divided into three periods: the Triassic Period, the Jurassic Period, , and the Cretaceous Period. The Triassic began around 248 million years ago, after the mass extinction that brought an end to the Permian Period. It lasted about 42 million years.eptiles Inherit The Earth. The Triassic Period is the first period of the Mesozoic Era. The great extinction at the end of the Permian period had brought the end to 90% of the living species on Earth. The Triassic was a time of growing new species to repopulate the planet.