Part A. (1What frequency doyou hear? Part B. (1)At this instant, whatis the velo
ID: 1666393 • Letter: P
Question
Part A. (1What frequency doyou hear?
Part B. (1)At this instant, whatis the velocity of point 1 on the string?(m/s) (2)What is thevelocity of point 2 on the string at the same instant? (3)What is the velocity of point 3 on the string at the sameinstant? Please and thankyou! Part A. A friend of yours is loudly singing a single noteat 415 Hz while racing toward youat 26.1 m/s on a day when the speed of soundis 342 m/s . (1What frequency doyou hear? (2What frequencydoes your friend hear if you suddenly start singingat 415 Hz ? Part B. The figure shows asnapshot graph of a wave traveling to the right along a stringat 45 m/s . (1)At this instant, whatis the velocity of point 1 on the string?(m/s) (2)What is thevelocity of point 2 on the string at the same instant? (3)What is the velocity of point 3 on the string at the sameinstant? Please and thankyou!
Explanation / Answer
f = 415 Hz, v = 26.1 m/s, speed of sound u = 342 m/s a) f ' = f*u/(u - v) = 449 Hz b) f " = f*(u + v)/u = 447 Hz