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10 godz. temu · Mach number represents the ratio of an object’s speed to the speed of sound. The speed of sound varies depending on factors like altitude and temperature, but at sea level and standard temperature, it’s approximately 767 miles per hour (1235 kilometers per hour). A Mach number of 1 indicates that an object is traveling at the speed of sound.
10 godz. temu · The Sun is the star at the center of the Solar System.It is a massive, nearly perfect sphere of hot plasma, heated to incandescence by nuclear fusion reactions in its core, radiating the energy from its surface mainly as visible light and infrared radiation with 10% at ultraviolet energies. It is by far the most important source of energy for life on Earth. ...
