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Two atmospheric sound sources A and B emit isotropically at constant power. The sound levels B of their emissions are plotted in the
figure versus the radial distance r from the sources. The vertical-axis scale is set by B1 = 84.0 dB and B2 = 60.0 dB. What are (a) the ratio
of the larger power to the smaller power and (b) the difference in their sound levels at r = 9.10 m?
B1
A
B
B2
100
500
1000
r (m)
(ЯР) я

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