- #1
zipking1988
- 4
- 0
some exam question(help help !)
Q1.A train traveling at 30 km/h is approached from behind by an ambulance sounding its siren.The ambulance ,which is traveling at a constant speed along a road parallel to the railroad,passes the train and subsequently stops at a distant point ahead of the train .The change in the frequency of the siren'sound was measure on the train .It was observed that frequency f' just after the ambulance stopped was the same as the frequency when the ambulance approached from far behind the train
Q2 What is the relationships between the magnitudes of f' and f ,the frequency of the siren 's sound source ?also ,what was the approximate speed at the ambulance traveled?from 1-6 below choose the correct combination
http://img3.imageshack.us/img3/3053/capture1gb.jpg
Q1.A train traveling at 30 km/h is approached from behind by an ambulance sounding its siren.The ambulance ,which is traveling at a constant speed along a road parallel to the railroad,passes the train and subsequently stops at a distant point ahead of the train .The change in the frequency of the siren'sound was measure on the train .It was observed that frequency f' just after the ambulance stopped was the same as the frequency when the ambulance approached from far behind the train
Q2 What is the relationships between the magnitudes of f' and f ,the frequency of the siren 's sound source ?also ,what was the approximate speed at the ambulance traveled?from 1-6 below choose the correct combination
http://img3.imageshack.us/img3/3053/capture1gb.jpg
Last edited by a moderator: