(b) Find the speed of sound in mercury given that the bulk modulus is 2.8×1010 Nm-2 and a density of 13600 kg m-2.
(c) Show that the difference in decibel levels, β1 and β2 of a sound source is related to the ratio of its distances r1 and r2 from the receivers by ⎟⎠⎞⎜⎝⎛=−=⎟⎟⎠⎞⎜⎜⎝⎛=−BALogLogBLogArPIrrand4Uselog2022112πββ
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