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For example, for visible light, the refractive index of glass is typically around 1.5, meaning that light in glass travels at c / 1.5 ≈ 200 000 km/s (124 000 mi/s); the refractive index of air for visible light is about 1.0003, so the speed of light in air is about 90 km/s (56 mi/s) slower than c.
1–1.5: 3.6–5.4: ... 320 km/h or 200 mph is a parameter sometimes used in defining a ... 1: Speed of light or other electromagnetic radiation in a vacuum or ...
Reducing the weight of the bike + rider by 1 kg would increase speed by 0.01 m/s at 9 m/s on the flat (5 seconds in a 32 km/h (20 mph), 40-kilometre (25 mile) time trial). The same reduction on a 7% grade would be worth 0.04 m/s (90 kg bike + rider) to 0.07 m/s (65 kg bike + rider).
A Suzuki GSX-R1000 at a drag strip – a 2006 model once recorded a 0 to 60 mph time of 2.35 seconds. This is a list of street legal production motorcycles ranked by acceleration from a standing start, limited to 0 to 60 mph times of under 3.5 seconds, and 1 ⁄ 4-mile times of under 12 seconds.
Markus Stöckl did beat the serial production bicycle record in 2011 when he reached 164.95 km/h (102.50 mph) on a volcano in Nicaragua and again in 2017 when he reached 167.6 km/h (104.1 mph) down a volcano in Chile. [13] The prototype bicycle record, on a volcano, still belongs to Barone.
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The two-way speed of light is the average speed of light from one point, such as a source, to a mirror and back again. Because the light starts and finishes in the same place, only one clock is needed to measure the total time; thus, this speed can be experimentally determined independently of any clock synchronization scheme.
Cycle World's road tests of the RC 390 also showed a top speed of 167 km/h (104 mph), but faster acceleration 0 to 1 ⁄ 4 mi (0.00 to 0.40 km) in 13.67 seconds at 147.87 km/h (91.88 mph), and from 0 to 97 km/h (0 to 60 mph) in 4.6 seconds.