Sound and Waves Homework Help

What are the three lowest frequencies for standing waves on a wire that is 14,0 m long, has a mass of 179 g, and is stretched under a tension of 750 N7

3 Prove that Beer's law and the expression for loss given as dB = 10 log1o exp(-2aL) are the same. One way to do this is to take 10 log10 of Beer's law, to obtain the loss in dB, and then realize that y = -8.685a.

10. Finally, try to make a constructive interference. This is a little easier. You will make an "up"wave as before, and then about the time of the 3rd green ball, make a "down" wave. What will be the direction of the "down" wave after it reflects?

5 If the attenuation coefficient for the wave in Eq. (3.8) has the value 2 x 10 cm, compute the power loss in dB for 1 km. Compute the fractional loss for 1 km.

3. What happens to that direction when the wave hits the clamp on the right and bounces back to you (up or down)?

1Draw a picture (or write a description) of two travelling waves that: a. Form Constructive interference (5 points)b. Form Destructive interference (5 points)

An ambulance with a siren emitting a whine at 1500 Hz overtakes and passes a cyclist pedaling a bike at 2.44 m/s. After being passed, the cyclist hears a frequency of 1490 Hz. How fast is the ambulance moving? (Use 343 m/s for the speed of sound in air.)

5. Calculate the displacement of a sine wave in mm of Time Period of 2 seconds and amplitude 8 cm, 0.3(2)seconds after the commencement of the wave.

3.7 Compute the reflectance at an AIGAAS-to-air boundary (at normal incidence). Compute the transmission loss in decibels.

Practical 1 - Laws of Motion Part A The aim of this practical is explore linear motion and the relationships between distance, displacement, velocity and acceleration.