The radiant time series (RTS) method is a new method, derived directly fiom the heat balance method, for performing. design cooling load calculations. It effectively replaces all other. simplified (non-heat-balance) methods such as the cooling load.
The last wheat pennies were made in 1958. They were produced from 1909 to 1958. They are generally common and worth a few cents above face value and can be found in pocket chaâ¦nge.
What's the Difference. If your Lincoln Memorial penny has a date before 1982, it is made of 95% copper. If the date is 1983 or later, it is made of 97.5% zinc and plated with a thin copper coating. For pennies dated 1982, when both copper and zinc cents were made, the safest and best way to determine their composition is to weigh them.