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 Jomon Period is the earliest historical era of Japanese history which began around 10,000 BCE, coinciding with the Neolithic Period in Europe and Asia, and ended around 300 BCE when the Yayoi Period began. The name Jomon, meaning 'cord marked' or 'patterned', comes from the style of pottery made during that time.