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Diffstat (limited to '3845/CH17/EX17.4/Ex17_4.sce')
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1 files changed, 16 insertions, 0 deletions
diff --git a/3845/CH17/EX17.4/Ex17_4.sce b/3845/CH17/EX17.4/Ex17_4.sce new file mode 100644 index 000000000..3b0888f94 --- /dev/null +++ b/3845/CH17/EX17.4/Ex17_4.sce @@ -0,0 +1,16 @@ +//Example 17.4
+f_s=150;//Frequency of horn (Hz)
+v_s=35;//Speed of train (m/s)
+v_w=340;//Speed of sound (m/s)
+f_obs1=f_s*(v_w/(v_w-v_s));//Frequency as the train approaches (Hz)
+printf('a.Frequency observed as the train approaches = %0.1f Hz',f_obs1)
+f_obs2=f_s*(v_w/(v_w+v_s));//Frequency after the train passes (Hz)
+printf('\n Frequency observed after the train passes = %0.1f Hz',f_obs2)
+v_obs=v_s;//Speed of observer (train's engineer) (m/s)
+//v_s and v_obs are both positive for this case, see point (3) under Solution for(b)
+f_obs=[f_s*((v_w+v_obs)/v_w)]*(v_w/(v_w+v_s));
+printf('\nb.Frequency observed by the train''s engineer = %0.1f Hz',f_obs)
+//The answer varies due to round off error
+//Openstax - College Physics
+//Download for free at http://cnx.org/content/col11406/latest
+
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