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 Cenozoic Era is divided into three periods: 1  Paleogene Period (65-23 million years ago), which consists of the Paleocene, Eocene and Oligocene epochs); 2  Neogene Period (23-2.6 million years ago), which includes the Miocene and Pliocene epochs);he Cenozoic Era, which began about 65 million years ago and continues into the present, is the third documented era in the history of Earth.