12:28 AM Fri Oct 13 [I] AA kudu.com + 6 Wallet - Apple Tutorial Credit Form X 14 Kudu Course Hero Part c (1 points) What will be the wavelength of the sound wave outside in the cold air? Give an answer accurate to at least 2 decimal points. Please enter a numerical answer below. Accepted formats are numbers or "e" based scientific notation e.g. 0.23, -2, 1e6, 5.23e-8 Enter answer here m No answer submitted CHECK ANSWER 0 of 5 checks used Part d (1 points) Assume there is a sharp boundary between the warm air in the concert hall and the cold air outside. What happens to the sound wave at that boundary? Hint: the acoustic impedance of cold air is higher than that of hot air. Select the correct answer No answer submitted CHECK ANSWER 0 of 3 checks used O Some of the wave is reflected and some is transmitted. Neither the reflected nor transmitted wave are inverted. The wave is fully transmitted into the cold outside air. O The wave is fully reflected back into the concert hall. Some of the wave is reflected and some is transmitted. The O transmitted wave is inverted and the reflected wave is not. O Some of the wave is reflected and some is transmitted. Both the reflected nor transmitted wave are inverted. Some of the wave is reflected and some is transmitted. The reflected O wave is inverted and the transmitted wave is not. Scroll to ? Back Questions12:27 AM Fri Oct 13 .0. kuducorri q) (I) 39% [Dr Question 5 This question contains multiple parts. Make sure to read all the instructions and answer each part. A wave is modeled with the function y(a:, t) = 0.25 cos(0.30m * 0.9015 + %) where all lengths are in meters and all times in seconds. Part a (1 points) Find the wavelength of the wave. Please enter a numerical answer below. Accepted formats are numbers or e based scientic notation e.g. 0.23.72.1e6, 5.23e78 20.944 m 0 Vour actual answer was 20 9/1 which differs front the answer above by a sinall rounding error or significant figures Check with your instructor how this Will be graded in a testing situation. Saved CHECK ANSWER 'l of 5 checks used Part [3 ('1 points) Find the period of the wave. Please enter a numerical answer below. Accepted formats are numbers or e based scientific notation e.g. 0.23.72.1e6, 5.23e78 5.981330 Your actual answer was 6 98 which differs from the answer above by a small rounding error or significant figures. Check with your instructor how this Will be graded in a testing situation Saved CHECK ANSWER 'l of 5 checks used Part C ('1 points) Find the wave speed (a positive number). Please enter a numerical answer below. Accepted formats are numbers or e based scientific notation e.g. 0.23,2,1e6, 5.23e-8 3m/so- 3mm CHECK ANSWER 12:29 AM Fri Oct13 no. I? Q. 38%E. [3:] ( AA kudu.com E}? C [B -|- i Wallet - Apple ' 5 Tutorial J E Credit Form l4 Kudu u Course Hero wave is inverted and the transmitted wave is not. Question 14 This question contains multiple parts. Make sure to read all the instructions and answer each part. In the gure below, a device is initially congured so that a sound wave starting from the speaker on the left divides into two paths that later recombine at the receiver on the right, with no difference between their path lengths. The sound wave is a pure tone with a wavelength of 2.0 meters. Image size: 5 M L Max Sliding section Receiver Source Part a (1 points) Fill in the blanks in the following statements: The two paths for the sound wave start out with the same length. The sound waves from the two paths exhibit interference. If a sound-absorbing plug is placed in one of the paths, preventing sound from getting through, then the amplitude ofthe sound wave at the receiver will be as big as when both paths are open. Select the correct answer No answer submitted CHECK ANSWER n nf '2 nhnnlln unnA 1 Fri Oct 13 . . . 38% ED AA kudu.com + Wallet - Apple Tutorial Credit Form X 14 Kudu Course Hero Part c (1 points) What will be the wavelength of the sound wave outside in the cold air? Give an answer accurate to at least 2 decimal points. Please enter a numerical answer below. Accepted formats are numbers or "e" based scientific notation e.g. 0.23, -2, 1e6, 5.23e-8 Enter answer here m No answer submitted CHECK ANSWER 0 of 5 checks used Part d (1 points) Assume there is a sharp boundary between the warm air in the concert hall and the cold air outside. What happens to the sound wave at that boundary? Hint: the acoustic impedance of cold air is higher than that of hot air. Select the correct answer No answer submitted CHECK ANSWER 0 of 3 checks used O Some of the wave is reflected and some is transmitted. Neither the reflected nor transmitted wave are inverted. O The wave is fully transmitted into the cold outside air. The wave is fully reflected back into the concert hall. Some of the wave is reflected and some is transmitted. The O transmitted wave is inverted and the reflected wave is not. O Some of the wave is reflected and some is transmitted. Both the reflected nor transmitted wave are inverted. O Some of the wave is reflected and some is transmitted. The reflected wave is inverted and the transmitted wave is not. Scroll to ? Back Questions12:26 AM Fri Oct 13 .0. kudu.corn q) (I) 39% (E. Question 1 (1 points) Consider an under-damped harmonic oscillator, consisting of a mass on a spring oscillating inside a bath of viscous uid, Which of the following statements is FALSE? Select the correct answer Ifthe drag coefficient (friction with the uid) becomes much larger, the system could become overdamped and will no longer oscillate. The mechanical energy of the mass-on-a-spring is conserved. Ifthe drag coefficient (friction with the uid) increases slightly, then the mass will still oscillate but the oscillations will damp out more quickly. The amplitude of the oscillation will decrease exponentially 0 w as time goes on. .Answer The potential energy of the mass goes up and down, with the peaks becoming lower over time. Saved CHECK ANSWER 3 of 3 checks used Question 2 (1 points) A child of mass 23.7 kg is sitting on a tire swing of mass 8.28 kg that hangs from cables 1.16 m long. With what frequency should the child pump his legs in order to achieve resonance and get himself swinging high with little effort? Give your answer in Hz (pushes per second) Please enter a numerical answer below. Accepted formats are numbers or "e\" based scientic notation eg. 0.23.72,1e6, 5.23e78 Enter answer here 0.426 H2 0.426 Hz Saved CHECK ANSWER 1 Fri Oct 13 . . . 38% ED AA kudu.com FC Wallet - Apple Tutorial Credit Form X 14 Kudu Course Hero 9cm/s O 3cm/s 11 cm/s 6 cm/s Your Answer O 4cm/s Part b (1 points) Now test your answer as follows: 1) Switch to Oscillate mode 2) Set the frequency to 2.5 Hz. Given the wave speed you selected in part (a), what do you expect for the wavelength of a wave with f = 2.5Hz? Give your answer in cm. Hit start, pause the wave, and look at the actual wavelength. Does it match what you predicted (it should, if your calculations for both parts were correct!) Please enter a numerical answer below. Accepted formats are numbers or "e" based scientific notation e.g. 0.23, -2, 1e6, 5.23e-8 Enter answer here cm No answer submitted CHECK ANSWER 0 of 5 checks used Question 11 (1 points) Sound is a longitudinal wave that travels at speed 343m/s in dry air at room temperature and standard pressure. Your ear is capable of differentiating sounds that arrive at the ear just 1.00 milliseconds apart. What is the minimum distance between two speakers that neodunn anuIndo that arrive at nationahlu different times? Scroll to ? Back Questions12:26 AM Fri Oct 13 . . . 39% kudu.com Kudu ? Support Question 3 (1 points) Wind gusts create ripples on the ocean that have a wavelength of 3.45 cm and propagate at 3.56 m/s. What is their frequency? Please enter a numerical answer below. Accepted formats are numbers or "e" based scientific notation e.g. 0.23, -2, 1e6, 5.23e-8 103 Hz Your Your actual answer was 103.19 which differs from the answer above by a small rounding error or significant figures. Check with your instructor how this will be graded in a testing situation. Saved CHECK ANSWER 1 of 5 checks used Question 4 (1 points) (#911023) {Wave Speed, Frequency, Wavelength} For a certain transverse wave, the distance between two successive crests is 1.76 m, and eight crests pass a given point along the direction of travel every 22.9 s. (i.e., eight full cycles of the wave pass a given point in this time). Calculate the wave speed. Please enter a numerical answer below. Accepted formats are numbers or "e" based scientific notation e.g. 0.23, -2, 1e6, 5.23e-8 0.615m/s Your Answer Your actual answer was 0.6142 which differs from the answer above by a small rounding error or significant figures. Check with your instructor how this will be graded in a testing situation. Saved CHECK ANSWER 1 of 5 checks used Question 5 This question contains multiple parts. Make sure to read all the instructions and answer each part. A wave is modeled with the function y (x, t) = 0.25 cos(0.30x - 0.90t + ?) where all lengths are in meters and all times in seconds. Part a (1 points) Find the wounlength of the wan Scroll to ? Back Questions12:29 AM Fri Oct 13 [I]