using System; using L=Science.Physics.GeneralPhysics; namespace Serway.Chapter17 { /// /// Example06: Doppler Submarines /// A submarine (sub A) travels through water at a speed /// of 8.0 m/s, emitting a sonar wave at a frequency of /// 1400 Hz. The speed of sound in the water is 1533 m/s. /// A second submarine (sub B) is located such that both /// submarines are traveling directly toward one another. /// The second submarine is moving at 9.0 m/s. /// (A) What frequency is detected by an observer riding /// on sub B as the subs approach each other? /// f' = 1416 Hz /// (B) The subs barely miss each other and pass. What frequency /// is detected by an observer riding on sub B as the subs /// recede from each other? /// f' = 1385 Hz /// public class Example06 { public Example06() { } private string result; public string Result { get{return result;} } public void Compute() { L.Sound s = new L.Sound(); s.TypicalSpeed = 1533.0; L.Frequency fs = new L.Frequency(); fs.Hz = 1400.0; L.Speed vs = new L.Speed(); vs.mPERs = 8.0; L.Frequency fo = new L.Frequency(); fo.VariableQ = true; L.Speed vo = new L.Speed(); vo.mPERs = 9.0; s.DopplerEffect(fs,vs,fo,vo); result+=Convert.ToString(fo.Hz)+"\r\n"; vs.mPERs = -8.0; vo.mPERs = -9.0; s.DopplerEffect(fs,vs,fo,vo); result+=Convert.ToString(fo.Hz); } } } //1415.60655737705 //1384.5554834523