ch36-p030 - 30. (a) We use Eq. 36-12: (1.22 ) (1450 m s )...

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30. (a) We use Eq. 36-12: () 11 1 3 1.22 1.22 1450m s 1.22 sin sin sin 6.8 . 25 10 Hz 0.60m s vf dd λ θ −− ⎡⎤ ⎛⎞ ⎢⎥ == = = ° ⎜⎟ × ⎝⎠ ⎣⎦ (b) Now f = 1.0 × 10 3 Hz so 122 122 1450 060 29 1
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