(a) What is the ratio of the intensity of an earthquake waveas it passes a point
ID: 1726921 • Letter: #
Question
(a) What is the ratio of the intensity of an earthquake waveas it passes a point 27 km from the sourceto the intensity as it passes a point 15km from the source?1
(b) What is the ratio of the amplitude of an earthquake wave as itpasses a point 27 km from the source tothe amplitude as it passes a point 15 kmfrom the source?
2
Assume waves radiate isotropically.
Intensity &alpha amplitude2
(a) What is the ratio of the intensity of an earthquake waveas it passes a point 27 km from the sourceto the intensity as it passes a point 15km from the source?
1
(b) What is the ratio of the amplitude of an earthquake wave as itpasses a point 27 km from the source tothe amplitude as it passes a point 15 kmfrom the source?
2
Assume waves radiate isotropically.
Intensity &alpha amplitude2
Explanation / Answer
(a) the ratio is given by I1 / I2 = (r2 /r1)2 = (15 km / 27 km)2 =........ (b) the ratio is given by a1 / a2 = (r2 /r1) = (15 km / 27 km) = .........
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