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- Outside temperature over a day can be modeled as a sinusoidal function. Suppose you know the temperature is 85 degrees at midnight and the high and low temperature during the day are 102 and 68 degrees, respectively. Assuming t is the number of hours since midnight, find a sine equation for the temperature, D, in terms of t. D(t) = %3DP • 3.00 m 4. Two speakers are in phase, set up to play the same tone, and arranged as shown in the figure. Which of the following wave- lengths would produce the loudest sound for a person standing 2.50 m at point P? А. 36 ст В. 68 ст C. 74 cm D. 91 cm08:41 Done 5 и 4G 1.4 Assuming that C₁ Cos (wot) and C₂ Sin (wot) in 1.2 are two independent solutions of the SHO differential equation, show that the sum of these two solutions as given in 1.2 is also a solution of the SHO differential equation. un m
- Intensity of sound (10] ^(-6) W/m^2, measured the intensity level? if the sound inaudible or audible?? %3D .A (inaudible) 50 .B (audible) 5 .c (inaudible) 5 .D (audible) 507:15 AA b.socrative.com HALA2241 3 of 6 FINISH QUIZ MULTIPLE CHOICE In the "Western" films, the actors can be seen putting their ears to a rail to see if the the train they are waiting for is approaching. If a train is located 5 km away, calculate the time taken for sound to propagate: 1) in the air. 2) in steel. We give: V air = 340 m / sand V steel = 5000 m / s. А Aair = 14.7s and Atsteel = 1s В Aair = 0.014s and Atsteel = 103 C Aair = 68s and Atsteel = 1000s 1 4The human vocal tract is a pipe that extends about 17 cm from the lips to the vocal folds (also called "vocal cords") near the middle of your throat. The vocal folds behave rather like the reed of a clarinet, and the vocal tract acts like a stopped pipe.
- • Interference of Triangular Pulses. Two triangular wave pulses are traveling toward each other on a stretched string as shown in Fig. E15.300. Each pulse is 15.30 identical to the other and travels at 2.00 cm/s. The leading edges of the pulses are 1.00 cm apart at t = 0. Sketch the shape of the string at t = 0.250 s, t = 0.500 s, t = 0.750 s, t = 1.000 s, and t = 1.250 s. v = 2.00 cm/s v = 2.00 cm/s 1.00 cm 1.00 cm 1.00 cm 1.00 cm 1.00 cm 1.00 cm 1.00 cm • Suppose that the left-traveling pulse in Exercise 15.30 is below the level of the 15.31 unstretched string instead of above it. Make the same sketches that you did in that exercise.Question 19 A vertical stick is dipped up and down in water at P. In two seconds, three wave crests are produced on the surface of the water. wave crests •P Which statement is true? O Distance Y is the wavelength of the waves. O Each circle represents a wavefront. O Distance X is the amplitude of the waves. O None of these O The frequency of the waves is 3Hz. A Moving to another question will save this response. 77 F Clear ^ arch OX &Numerical - Standing Waves Two waves traveling in opposite directions produce a standing wave. The individual wave functions are Yı = (4.0cm) sin(3.0x – 2.0t) andy, = (4.0cm) sin(3.0x + 2.0t) %3D 1. Find the amplitude of the simple harmonic motion of the element of the medium located at x = 2.3 cm. II. Find the positions of the nodes and antinodes if one end of the string is at x = 0. III. What is the maximum value of the position in the simple harmonic motion of an element located at an antinode?
- AW-1 Two identical waves of the same wavelength, frequency and speed are traveling in the same direction but are 60.0° out of phase. a) Use the analytical method (an equation) to find the amplitude of the resultant (net) wave if both waves have an amplitude of 2.00cm. b) Use the graphical method (phasors) to find the amplitude of the resultant (net) wave if both waves have an amplitude of 2.00cm. c) Now let one wave have an amplitude of 2.00cm and the other have an amplitude of 3.00cm. Use any appropriate method to find the amplitude of the resultant (net) wave.Two point sources, 3.0 cm apart, are generating periodic waves in phase. A point on the third antinodal line of the wave pattern is 10 cm from one source and 8.0 cm from the other source. Construct a sketch of the physical situation and determine the wavelength of the waves. PSYWL • A 30cm tube closed at one end resonates its fundamental frequency with a tuning fork of unknown frequency. If the end correction of the tube is 2.25cm, determine the frequency of the fork. [velocity of sound in air=330m/s] • A tube of length 27.5cm is closed at one end. If it resonates with a tuning fork of frequency 262HZ, calculate the end correction of the tube. [Take the speed of sound in air as 330m/s] • In a resonance tube experiment, the first and second resonant lengths are 0.34m and 1.05m respectively. Calculate the frequency of the tuning fork used. [Take the velocity of sound in air as 340m/s]