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Thunder is the sound caused by and after lightning. [ 1 ] [ 2 ] [ 3 ] Depending upon the distance from and nature of the lightning, it can range from a long, low rumble to a sudden, loud crack. The sudden increase in temperature and hence pressure caused by the lightning produces rapid expansion of the air in the path of a lightning bolt . [ 4 ]
The flash of a lightning strike and resulting thunder occur at roughly the same time. But light travels 300,000 km/sec, almost a million times the speed of sound. Sound travels at the slower speed of about 340 m/sec (depending on the temperature), so the flash of lightning is seen before thunder is heard. A method to determine the distance ...
The ancient Etruscans produced guides to divining the future based on the omens supposedly displayed by thunder or lightning. [182] [183] Such use of thunder and lightning in divination is also known as ceraunoscopy, [184] a kind of aeromancy. In the traditional religion of the African Bantu tribes, lightning is a sign of the ire of the gods.
A thunderstorm, also known as an electrical storm or a lightning storm, is a storm characterized by the presence of lightning [1] and its acoustic effect on the Earth's atmosphere, known as thunder. [2] Relatively weak thunderstorms are sometimes called thundershowers. [3] Thunderstorms occur in a type of cloud known as a cumulonimbus. [4]
More simply, the speed of sound is how fast vibrations travel. At 20 °C (68 °F), the speed of sound in air, is about 343 m/s (1,125 ft/s; 1,235 km/h; 767 mph; 667 kn), or 1 km in 2.91 s or one mile in 4.69 s. It depends strongly on temperature as well as the medium through which a sound wave is propagating.
Through 11 games with the Thunder, Gordon Hayward has averaged 4.0 points, 2.0 assists, 3.1 rebounds in 16.8 minutes.
Big Thunder Mountain Railroad was designed by Imagineer Tony Baxter [3] and ride design engineer Bill Watkins. The concept came from Baxter's work on fellow Imagineer Marc Davis's concept for the Western River Expedition, a western-themed pavilion at the Magic Kingdom, designed to look like an enormous plateau and contain many rides, including a runaway mine train roller coaster.
The Thunder locked up one of the league's most underrated multi-tool role players on a five-year, $47 million deal Monday. Wiggins shot 49.2% on 1.6 3-point attempts per game last year, also ...