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Fewer than 5% of tornadoes in Canada are rated F3 or higher in intensity, where wind speeds are in excess of 225 km/h (140 mph). Prior to April 1, 2013, Canada used a slightly modified Fujita scale , and as of that date the Enhanced Fujita scale , again slightly modified, was put into use to rate tornado intensity, based on the damage to ...
A man standing next to large ocean waves at Porto Covo, Portugal Video of large waves from Hurricane Marie along the coast of Newport Beach, California. In fluid dynamics, a wind wave, or wind-generated water wave, is a surface wave that occurs on the free surface of bodies of water as a result of the wind blowing over the water's surface.
Spring and autumn are both short and highly variable. Edmonton's growing season is from May 9 to September 22; [4] [11] Edmonton averages 135–140 frost-free days a year. [4] [12] At the summer solstice, Edmonton receives 17 hours and three minutes of daylight, with an hour and 46 minutes of civil twilight. [13]
The Edmonton Transit Service (ETS) is the city's public transit agency, operating the Edmonton Light Rail Transit (LRT) network as well as a fleet of buses. [316] In 2017, ETS served approximately 86,997,466 people; the bus system saw 62,377,183 riders, while the LRT network served 24,620,283 passengers. [317]
An added large steel tower atop the light is a radio beacon. The 1953 Coast Guard Light List indicates that the signal transmitted at 296 kHz, send forth a group of half-second dashes for 15.5 seconds, followed by 14½ seconds of silence. As of 2001, both the light and radio beacon served as active navigational aids. [3]
The faster the relative velocity, the greater the time dilation between them, with time slowing to a stop as one clock approaches the speed of light (299,792,458 m/s). In theory, time dilation would make it possible for passengers in a fast-moving vehicle to advance into the future in a short period of their own time.
Gravitational time dilation is a form of time dilation, an actual difference of elapsed time between two events, as measured by observers situated at varying distances from a gravitating mass. The lower the gravitational potential (the closer the clock is to the source of gravitation), the slower time passes, speeding up as the gravitational ...
To relate radar timing to distances traveled by radar energy, the speed is used to calculate it. With speed of radar waves at approximately the speed of light in vacuum or 299,792,458 metres per second (300 m/μs; 984 ft/μs) and nautical mile at 1,852 metres (6,076 ft), the delay per nautical mile until the wave return is calculated as: