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.
50% is absorbed by the Earth's surface. This energy heats the land and water. 20% is absorbed by gases and particles in the atmosphere. 25% on incoming sunlight is reflected by clouds, dust, and gases in the air. 5% is reflected by the surface back into the atmosphere.