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.
1. Prehistoric refers to the time before we began recording events in writing. 2. Prehistory is divided into two main periods, Paleolithic and Neolithic, with a transitional period called the Mesolithic.3.These periods are known as stone ages because during this time tools and hunting weapons were made from stone.rehistory is divided into two main periods, Paleolithic and Neolithic, with a transitional period called the Mesolithic. 3. These periods are known as stone ages because during this time tools and hunting weapons were made from stone.