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.
THE ATMOSPHERE AND RADIO WAVES. The atmosphere plays a vital role in the way in which radio waves travel around the earth. Without its action it would not be possible for signals to travel around the globe on the short wave bands, or travel greater than only the line of sight distance at higher frequencies. with an interest in the topic.