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.
Media Access Control Address (MAC address) The MAC address may also be known as ethernet hardware address (EHA), hardware address, adapter address, or physical address of a computer or networking device. Common tools display the MAC address of a device, or of devices present in the same local network. The MAC address is 24 bit long, formatted like 00-0C-29-20-99-07 and uniquely identifies the manufacturer of the network card/device. For example 00-0C-29-20-99-07 maps to VMware, Inc., USA.