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109. (a) In regions where the speed is constant, it is equal to distance divided by time.
Thus, we conclude that the time difference is
Ld
d
L
t
VV
V
V
§·
−
Δ=
+
−
¨¸
−Δ
©¹
where the first term is the travel time through bone and rock and the last term is the
expected travel time purely through rock. Solving for
d
and simplifying, we obtain
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This note was uploaded on 03/20/2010 for the course PHYSICS 191262 taught by Professor Najafzadeh during the Spring '09 term at The Petroleum Institute.
 Spring '09
 NAJAFZADEH
 mechanics

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