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Συνάδελφε, παρακάτω θα βρεις το κείμενο και συνημμένο το αρχείο mp3. Εγώ τα λέω με το σωστό ρυθμό αλλά το ύφος δεν είναι πάντα σωστό (γιατί προέρχεται από πολύ κόψε ράψε). Δεν πρέπει να πέφτεις χρονικά ΑΚΡΙΒΩΣ εκεί που πέφτω εγώ, αλλά στο περίπου, κυρίως να διατηρήσεις το ρυθμό. Γραφτό στο μικρόφωνο της κάμερας (μακριά από το ψυγείο και τον υπολογιστή που κάνουν θόρυβο) και κάντο export σε mp3, στα 192 ΚΒ/sec ή σαν CD quality. Η παραγωγή διαθέτει δυστυχώς μόνο 75 Ευρώ! Αν τα βιάζεσαι στείλε λογαριασμό τραπέζης για κατάθεση αύριο. Σε φιλώ, Άγγελος The AVERAGE SPEED of a common snail is 1 mm/sec. On the other hand, the AVERAGE forest fire SPEED is 1.000 mm/sec, related to an AVERAGE wind SPEED of 10.000 mm/sec. At the same time, the AVERAGE SPEED of an Aerial fire-fighting, Search and Rescue aircraft, is 100.000 mm/sec At the end, the snail is burnt and wet, The snail is dead. SPEED is the rate of motion. As a physical property represents primarily instantaneous SPEED. In real life we often use AVERAGE SPEED, which is rate of total distance and time interval. Filmed in the burnt forest around the village of ASSEA ARCADIA GREECE Summer 2007. The AVERAGE SPEED of a common snail is 0,0036 Km/h that equals to 1 mm/sec. On the other hand, the AVERAGE forest fire SPEED is 3,6 Km/h or 1.000 mm/sec, related to an AVERAGE wind SPEED of 5 Beaufort that equals to 36 Km/h or 10.000 mm/sec At the same time, the AVERAGE SPEED of a Canadair CL-215, Aerial fire-fighting, Search and Rescue aircraft, is 360 Km/h or 100.000 mm/sec At the end, the snail is burnt and wet, The snail is dead. SPEED is the rate of motion. As a physical property represents primarily instantaneous SPEED. In real life we often use AVERAGE SPEED, which is rate of total distance and time interval. Filmed in the burnt forest around the village of ASSEA ARCADIA GREECE Summer 2007 AVERAGE SPEED A film by Angelos Spartalis Written & directed by Angelos Spartalis Music by OBLIVION, Antonis Papaspyros Produced by Angelos Spartalis & Angela Svoronou Wish You Luck film productions © 2007 Speed is the rate of motion. As a physical property represents primarily instantaneous speed. In real life we often use average speed, which is rate of total distance and time interval. The Average Speed of a common snail is 1 mm/sec. The Average forest fire speed is 5 Km/h Related to an average wind speed of 5 Boufort that equals to 30 Km/h The average speed of a Canadair CL-215 Aerial fire-fighting / Search and Rescue aircraft is 290 Km/h At the end, the snail is burned and wet, The snail is dead. Speed is the rate of motion, or equivalently the rate of change in position, many times expressed as distance d traveled per unit of time t. Speed is a scalar quantity with dimensions distance/time; the equivalent vector quantity to speed is known as velocity. Speed is measured in the same physical units of measurement as velocity, but does not contain the element of direction that velocity has. Speed is thus the magnitude component of velocity. In mathematical notation, it is simply: Note that "S" is speed. Objects that move horizontally as well as vertically (such as aircraft) distinguish forward speed and climbing speed. Average speed Speed as a physical property represents primarily instantaneous speed. In real life we often use average speed (denoted ), which is rate of total distance (or length) and time interval. For example, if you go 60 miles in 2 hours, your average speed during that time is 60/2 = 30 miles per hour, but your instantaneous speed may have varied. In mathematical notation: Examples of different speeds Below are some examples of different speed (see also main article Orders of magnitude (speed)): Speed of a common snail = 0.001 m/s; 0.0036 km/h; 0.0023 mph. A brisk walk = 1.667 m/s; 6 km/h; 3.75 mph. Olympic sprinters (average speed over 100 metres) = 10 m/s; 36 km/h; 22.5 mph. Speed limit on a French autoroute = 36.111 m/s; 130 km/h; 80 mph. Top cruising speed of a Boeing 747-8 = 290.947 m/s; 1047.41 km/h; 650.83 mph; (officially Mach 0.85) Official air speed record = 980.278 m/s; 3,529 km/h; 2,188 mph. Space shuttle on re-entry = 7,777.778 m/s; 28,000 km/h; 17,500 mph. the speed of sound in air (Mach 1) is about 340 m/s, and 1500 m/s in water Taipei 101 Observatory Elevator = 1010 m/min ; 16.667 m/s ; 60.6 km/h; 37.6 mph Units Units of speed include: meters per second, (symbol m/s), the SI derived unit centimeters per second, (symbol cm/s) kilometers per hour, (symbol km/h) miles per hour, (symbol m/h) knots (nautical miles per hour, symbol kt) Mach, where Mach 1 is the speed of sound; Mach n is n times as fast. Mach 1 ≈ 343 m/s ≈ 1235 km/h ≈ 768 mph (see the speed of sound for more detail) speed of light in vacuum (symbol c) is one of the natural units c = 299,792,458 m/s Other important conversions 1 m/s = 3.6 km/h 1 mph = 1.609 km/h 1 knot = 1.852 km/h = 0.514 m/s Vehicles often have a speedometer to measure the speed. Beaufort 5 m/s 9 km/h knots miles/h 34 18 21 The average speed of a Canadair CL-215 Aerial fire-fighting / Search and Rescue aircraft is 290 Km/h Take-off Speed 88kts (163km/h) Landing Speed 85kts (157km/h) Cruise Speed 160 - 170kts (296 - 315km/h) Maximum Speed 187kts (346km/h) Forest fire spread and intensity were modeled as a function of wind and fuel. Spread rate and intensity of forest fire were related to weight and thickness of forest fuel beds and to wind speed. Forest fire spread rate and fire intensity were differentiated according to wind speed. Rapid wind speed causes a faster forest fire spread rate and greater fire intensity than does slow wind speed. Relative burning time of the fire from beginning to end in the model was 161 sec at a wind speed of 0.5m/sec and 146 sec at 1m/sec on the model Average forest fire spread rate was 0.014m/sec at a wind speed of 0.5m/sec and 0.020m/sec at 1 m/sec, Average fire intensity was 0.183kW/m at a wind speed of 0.5m/sec, o.259kW/m at 1m/sec. Fire intensity was greater when forest fire spread rate was rapid.