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the stratosphere extends from a height of 10 km to 50 km above the surface of the Earth.
the separation of a dye into the different colours that make up that dye, as a result of the...
a material that has intermediate electrical conductivity that can be changed and controlled. It...
a process whereby molecules combine automatically to form new ions as in the case of water.
completes the circuit between the two half-cells in an electrochemical cell.