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Physics, 01.12.2021 01:10 Jazzy4real
6. The fire-security system of the buildings will be activated if the internal temperature passes 140 [°F]. The siren will make a sound with frequency 915 [Hz]. What will be the frequency of the sound heard by the observer who moves toward the building with the speed 5 [m/s]. The average speed of the sound in the air: 340 [m/s]. Round the result to the nearest tenth.
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