terça-feira

O momento em que o F18 passa a barreira do som (vídeo)





Além da formação da 'nuvem branca', ouve-se- o 'sonic boom' (associado ao momento em que as ondas de choque são criadas por um obejto que viaja a uma velocidade maior do que o som).


When an aircraft passes through the air it creates a series of pressure waves in front of it and behind it, similar to the bow and stern waves created by a boat. These waves travel at the speed of sound, and as the speed of the object increases, the waves are forced together, or compressed, because they cannot get out of the way of each other. Eventually they merge into a single shock wave, which travels at the speed of sound, a critical speed known as Mach 1, and is approximately 1,225 km/h (761 mph) at sea level and 20 °C (68 °F).
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