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.
If the physical memory is 32MB (2 25 bytes), the number of frames is 2 25 / 2 10 = 2 15 and this is also the maximum number of pages that can be present in memory at the same time. The logical address space is larger than the physical address space, a process can address 2 32 memory locations that is 2 32 / 2 10 = 2 22 pages.