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Physics, 22.06.2019 01:30
Ajet plane has a sound level of 120 db at a distance of 60 m. what is the q23. sound level at a distance of 6.0 km? (60)2 (6000)? om solution 80db db, hint: 16x assume ultrasound waves travel through the body of an animal at 1540 q24. m/s. if a 30,000 hz signal were reflected off a portion of a heart which was moving toward the source at 3 m/s, what frequency signal would return to the stationary source? solution 30.117hz
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Physics, 22.06.2019 03:50
The intensity of a polarized electromagnetic wave is 12 w/m^2. part a) what will be the intensity after passing through a polarizing filter whose axis makes the angle ฮธ=0โ with the plane of polarization? part b) what will be the intensity after passing through a polarizing filter whose axis makes the angle ฮธ=30โ with the plane of polarization? part c) what will be the intensity after passing through a polarizing filter whose axis makes the angle ฮธ=45โ with the plane of polarization? part d) what will be the intensity after passing through a polarizing filter whose axis makes the angle ฮธ=60โ with the plane of polarization? part e) what will be the intensity after passing through a polarizing filter whose axis makes the angle ฮธ=90โ with the plane of polarization?
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