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The speed of light in vacuum, commonly denoted c, is a universal physical constant that is exactly equal to 299,792,458 metres per second (approximately 300,000 kilometres per second; 186,000 miles per second; 671 million miles per hour).
The most noticeable aspect of lightning and thunder is that the lightning is seen before the thunder is heard. This is a consequence of the speed of light being much greater than the speed of sound. The speed of sound in dry air is approximately 343 m/s (1,130 ft/s) or 1,236 km/h (768 mph) at 20 °C (68 °F; 293 K). [19]
[40] [41] [43] [88] [page needed] A Lightning fitted with Avon 200-series engines, a ventral tank, and two Firestreak missiles had a maximum speed of Mach 1.9 (2,328 km/h; 1,446 mph) on a standard day; [89] while a Lightning powered by the Avon 300-series engines, a ventral tank and two Red Top missiles had a maximum speed of Mach 2.0. [62]
Lightning-induced magnetic anomalies can be mapped in the ground, [121] [122] and analysis of magnetized materials can confirm lightning was the source of the magnetization [123] and provide an estimate of the peak current of the lightning discharge.
The longest known lightning events have been given world-record status by the World Meteorological Organization, or WMO, in a recently published study. Study: World-record lightning flash was ...
At 4.0 seconds flat to 60 mph, Lightning is a very appropriate name. For premium support please call: 800-290-4726 more ways to reach us
Gusts of up to 40 mph are expected later in the afternoon and winds of 20-30 mph possible along and west of I-35. “Most of Central and East Texas will still experience gusty winds today, but not ...
The jet was initially observed to be traveling up at around 50 km/s (110,000 mph; 180,000 km/h) at a speed similar to typical lightning, increased to 160 and 270 km/s (360,000–600,000 mph; 580,000–970,000 km/h), but then split in two and sped upward with speeds of at least 2,000 km/s (4,500,000 mph; 7,200,000 km/h) to the ionosphere where ...