S11_Practice_midterm_1

S11_Practice_midterm_1 - Physics 1B Spring 2011: Practice...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Physics 1B – Spring 2011: Practice Midterm 1 Problem 1: Consider two speakers, both on the y-axis, separated by a distance d=2 meters, and with the bottom speaker at the origin. Each speaker emits the same sound wave, in phase, with frequency f 0 = 514 Hz. a) Determine which on the positive x-axis will exhibit constructive and destructive interference b) The top speaker is now removed, and a moving reflecting surface is placed to the right of the remaining speaker and is moved toward it with speed v surface =2 m/s. What frequency would a listener standing at the location of the speaker hear reflected back from the moving surface?
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Problem 2: This problem walks you through a derivation of standing waves produced by two speakers. You will need the angle addition formula for cosines: cos(a+b) = cos(a)cos(b) - sin(a)sin(b) a) Consider two speakers on the x-axis a distance D apart from each other. Each emits a wave with the same wavelength, frequency, and phase (you can take the phase to be 0) in all directions. Let’s place the origin at the location of the left
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 3

S11_Practice_midterm_1 - Physics 1B Spring 2011: Practice...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online