Electronic speed control. An electronic speed control or ESC is an electronic circuit with the purpose to vary an electric motor's speed, its direction and possibly also to act as a dynamic brake.
The ionosphere is the layer of the atmosphere that reflects radio waves. This effect is caused by the ionization, or electrical charging, of the gas particles present in the upper atmosphere by... The ionosphere is the layer of the atmosphere that reflects radio waves. This effect is caused by the ionization, or electrical charging, of the gas particles present in the upper atmosphere by X-rays and ultraviolet rays emitted by the sun.
1 The incoming radiation from the sun is short wave ultraviolet and visible radiation. 2  Some of this radiation is absorbed by the earths atmosphere. 3  Some of the radiation is reflected back into space by the earths surface.  The radiation which is reflected back into space is infrared radiation and has a longer wavelength.