If either the observer and/or the sound source are moving,
the frequency heard by the observer differs from that when both
are stationary; this is the Doppler Effect.
If the observer and source are stationary, f = v/λ, where v
is the speed of sound.
Case 1: Observer moves with velocity u toward a stationary
source: f=f (1 + u/v).
Case 2: Observer moving with velocity u away a stationary
source: f = f(1 u/v).
Case 3: Source moving (u) toward a stationary observer: f
= f / (1 u/v).
Case 4: Source moving (u) away from a stationary observer:
f = f /(1 + u/v).
Lecture Slides are screen-captured images of important points in the lecture. Students can download and print out these lecture slide images to do practice problems as well as take notes while watching the lecture.
The book offers a complete review of your AP course, strategies to give you the edge on test day, and plenty of practice with AP-style test questions. It includes full length practice exams modeled on the real test and all the terms and concepts you need to know.
This book includes a review of all the topics tested including vectors, kinematics, fluid mechanics, optics and nuclear physics. Additionally, the book includes two full length tests made complete with descriptive solutions, and quick study tables for Physics B formulas and equations.