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Quizlet's primary products include digital flash cards, matching games, practice electronic assessments, and live quizzes. In 2017, 1 in 2 high school students used Quizlet. [ 4 ] As of December 2021, Quizlet has over 500 million user-generated flashcard sets and more than 60 million active users.
The speed to fly is the optimum speed through sinking or rising air mass to achieve either the furthest glide, or fastest average cross-country speed. [1] Most speed to fly setups use units of either airspeed in kilometers per hour (km/h) and climb rate in meters per second (m/s), or airspeed in knots (kn) and climb rate in feet per minute (ft ...
The tip speed (u) is about 1 m/s (3.3 ft/s), and the corresponding Reynolds number about 103. At the smaller end, a typical chalcidoid wasp has a wing length of about 0.5–0.7 mm (0.020–0.028 in) and beats its wing at about 400 Hz.
Average horizontal speed Maximum horizontal speed Maximum airspeed Remark Peregrine falcon: Falco peregrinus: Falconidae: 65–90 km/h 40–56 mph [4] 110 km/h 68 mph [4] 389 km/h 242 mph [5] High-speed dive—pointed long wings Saker falcon: Falco cherrug: Falconidae: 150 km/h 93 mph [6] 320 km/h 200 mph [7] High-speed dive—pointed long ...
The knot (/ n ɒ t /) is a unit of speed equal to one nautical mile per hour, exactly 1.852 km/h (approximately 1.151 mph or 0.514 m/s). [1] [2] The ISO standard symbol for the knot is kn. [3]
In Europe, the sporting (FAI) definition limits the maximum stalling speed to 65 km/h (40 mph) and the maximum take-off weight to 450 kg (992 lb), or 472.5 kg (1,042 lb) if a ballistic parachute is installed. The definition means that the aircraft has a slow landing speed and short landing roll in the event of an engine failure.
Test of typical performance. In this case, an individual's performance is assessed according to a given situation. Answers are not right or wrong, but identify choices, preferences and strengths of feeling. Test of maximum performance: These assess the individual's ability to perform effectively under standard conditions.
The ability to fly both low and slow safely, the "open" feel, the minimal equipment and maintenance costs, and the portability are claimed to be this type of flying's greatest merits. [ 1 ] Powered paragliders usually fly between 15 and 50 mph (24 and 80 km/h ) at altitudes from 'foot-dragging' up about to 18,000 ft (5,500 m ) or more with ...