EDDY Apprentice. Whats the difference between CNC and NC machine and do u people know any institute which teaches CNC programming. #1 Jul 24, 2009. Aashish Joshi Maniac. Engineering Discipline: Mechanical. In a Numerical Control machine, the program is fed to the machine through magnetic tapes or other such media.
A volcano is a vent or chimney which transfers molten rock known as magma from depth to the Earth's surface. Magma erupting from a volcano is called lava and is the material which builds up the cone surrounding the vent. A volcano is active if it is erupting lava, releasing gas or generates seismic activity.
A hydrothermal vent is a crack or breakage in the Earthâs surface. Water which is heated by the internal heat of the Earth is released from the vent. The source of this water is cold sea water (2oC) which seeps into the fractures and is heated by the hot magma (1400oC) found in shallow chambers under the sea floor. There are two general types of hydrothermal vents. One is where water spreads out over a large area.The temperature of this water is between 10 and 20Â°C.