Exercise 14.39 Part A Ocean waves pass through two small openings, 27 m apart, i

Question

Exercise 14.39 Part A Ocean waves pass through two small openings, 27 m apart, in a breakwater. You're in a boat 74 m from the breakwater and inibally midway between the openings, but the water is pretty rough. You row 32 m parallel to the breakwater and, for the second time, find yourself in relatively calm water What is the wavolength of the ocean waves? Express your answer using two significant figures A- 23 Submit My Answers Give Up Incorrect Try Again; 3 attempts remaining MasteringPhysics: HW 8 Ch 13-14-Google Chrome secure | https/ Submitted Answers ANSWER 1 A 7.78 m ANSWER 2 = 23 m

Explanation / Answer

The lengths of paths are:

P1 = sqrt(L^2 +(l-d/2)^2) = sqrt(74^2 +(32-27/2)^2)

= 76.28 m

P2 = sqrt(L^2 +(l+d/2)^2) = sqrt(74^2 +(32+27/2)^2)

= 86.87 m

Lambda = 2*(P2-P1) = 2*(86.87-76.28)

= 21 m

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