Labels:airplane | car | chair | fence | plane | sky | windowpane OCR: SPEED OF SOUND "HE SPEED of sound can vary. of sound in air. When an airplane Sound travels through air a passes the speed ol sound (known 1,130 feet (344 m per second as breaking the sound barrier) Sound travels faster through water breaks through sound waves that because the vibrations are more have been traveling ahead ofit, easily passed on Some aircraft can crea ting shock wave This results travel at speeds greater than that loud bang ot sonic boom Approaching the sound barrier Breaking the sound barrier Sound waves build front 0 The airplane breaks the souma the airplane a nears the speed barrier and lleaves bebind punos shock wave paedd Souna leaves
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