..ooo cricke t12:07 AM Done 8 of 8 Problem 17 (5.00 pts). tape ontheendofa4com a
ID: 1771558 • Letter: #
Question
..ooo cricke t12:07 AM Done 8 of 8 Problem 17 (5.00 pts). tape ontheendofa4com ang metalhar. A microphone Eheotherend Piup two-of ound, one that travels through the bar, the other through the air. The palses are separated by Whacis the speed of sound in the bar? Assume the speed of sound in air ins 343 ms and the pelse troe he br 5174 m's 176 ms C) 2587 's D) 352 ms E) Cannot be determined o, GC11071 Problem 18: (5.00 pts) A traveling wave has a displacement given by yout)-20mosa-where s ismeascd sesand t in & What is the speed of the wave? B) 200 cm C) 4.00 cm Problem 19: (s.00 pts) Light from a sodium lamp (h $89 m) illaminates two narrow slits. The spacing betes two cseseeutive bright fringes isonaserven iso em behind the slits is 40 mm, whe-the spacing(in) he-de- slits? A) 0.442 mm 0 221 mm E) 0056 mm Problem so: (s.oo pe) The spacing betweren atoms in graplie is approximately o.asnm. What is the enerngy of an sny phoe with this wavelength A) 795 x lo- DP160 x 1015J 3.98 x 10-16 J D)3.18x10 E) 1.00 x teExplanation / Answer
Problem 17)
L = 4 m ; v = 343 m/s ; t = 11 ms
We know that,
s = d/t => t = d/s
in air
t = 4/343 = 0.0117
time in the bar will be:
T = 0.0117 - 0.011 = 0.0007
v = d/T = 4/0.0007 = 5714.3 m/s
Hence(a) is the correct answer
[I assume there is a typing error in the option (A)5174 instead of 5714 m/s]
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.