Lava is the extrusive equivalent of magma. Magma (from Greek Î¼Î¬Î³Î¼Î±, thick unguent) is a mixture of molten or semi-molten rock, volatiles and solids that is found beneath the surface of the Earth, and is expected to exist on other terrestrial planets. Besides molten rock, magma may also contain suspended crystals, dissolved gas and sometimes gas bubbles.
United States military occupation code. A United States military occupation code, or a military occupational specialty code (MOS code), is a nine character code used in the United States Army and United States Marines to identify a specific job. In the United States Air Force, a system of Air Force Specialty Codes (AFSC) is used.
What does the âMOPDâ rating on solenoid valves mean? Solenoid valves are rated in terms of Maximum Operating Pressure Differential (MOPD). The MOPD rating for a valve is the maximum pressure differential against which the valve will reliably operate. For example, with the valve closed against an inlet pressure of 250 psi and an outlet pressure of 50 psi, the pressure differential across the valve is 250-50 or 200 psi. Emerson. Consider It Solved.â¢.