The atoms that make up a molecule can be of the same element or different types. Diatomic molecules are a specific class of molecules that consist of two molecules of the same element. If the molecule is composed of atoms of at least two different elements, it is a chemical compound.
The cost of light rail construction varies widely, largely depending on the amount of tunneling and elevated structures required. A survey of North American light rail projects shows that costs of most LRT systems range from $15 million to over $100 million per mile.he cost of 17 miles (27 km) of highway improvements and 19 miles (31 km) of double-track light rail worked out to $19.3 million per highway lane-mile and $27.6 million per LRT track-mile. The project came in under budget and 22 months ahead of schedule.
Chart 3 description: Chart 3 shows the subcomponent shares of the transportation costs such as intercity truck (50%), local truck (27%), railroad (6%), logistics administration (6%), water (4%), air (4%), oil pipelines (1%), forwarders (1%), and shipper-related costs (1%).he latest available estimates of logistics costs from CASS are those for the year 2002. Table 2, based on data from the 14th edition of the CASS Annual State of Logistic Reports, shows that the total logistics costs were $910 billion in 2002, equivalent to 8.7% of the U.S. gross domestic product in the same year.