Expected Levels. Total hardness in freshwater is usually in the range of 15 to 375 mg/L as CaCO3. Calcium. hardness in freshwater is in the range of 10 to 250 mg/L, often double that of magnesium. hardness (5 to 125 mg/L). Typical seawater has calcium hardness of 1000 mg/L, magnesium.
Part of the Storage management glossary: A physical address is a binarynumber in the form of logical high and low states on an address busthat corresponds to a particular cell of primary storage(also called main memory), or to a particular register in a memory-mapped I/O(input/output) device.
Note that the Network Card Address/Physical Address/MAC Address is an alphanumeric value, which is listed in six groups of two hexadecimal digits, separated by hyphens (-) or colons (:), e.g., 01-2B-C5-67-89-ab or 01:2B:C5:67:89:ab.