Question 15 (5 points) Choose ONE of the following questions to complete (5 marks) 1) An organ pipe open at one end and closed at the other is 40 cm long. If the temperature in the church is 30 *C, what is the first harmonic (fundamental frequency) and second harmonic (first overtone) of the pipe? 2) At a rock concert, the length of a bass guitar string is 76cm. If the temperature at the concert is 42 "C, what is the first harmonic (fundamental frequency) and second harmonic (first overtone) of the bass guitar? For your answers below enter 3 significant digits ONLY (no units or directions here; include them instead in full solutions). Ex: Actual answer: 12.035 You enter: 12.0 or Actual answer: 1.634 x 10^4 You enter: 16600 Blank # 1 A/ Blank # 2 A/Question 16 [2 points) When I play.r a note of 400Hz nearby.r a sound source of an unknown frequency, | end up hearing 15 beats over the course of 5 seconds. What are the possible frequencies of the unknown source? {2 marks) For your answers below enter 3 significant digits ON LY {no units or directions here; include them instead in full solutions). Ex: Actual answer: 12.035 You enter: 12.0 or Actual answer: 1.634 x 10% You enter: 16600 Blank# 1 '9?\" Blank#2[ ] ,5}