Afrench submarine and a u. s. submarine move toward each other during maneuvers in motionless water in the north atlantic. the french sub moves at speed vf-50.0 km/h, and the us. sub at vu,-70.0 km/h. the french sub sends out a sonar signal (sound wave in water) at 1000 hz. sonar waves travel at 5470 km/h. (a) what is the signal's frequency as detected by the u. s. sub? (b) what fre- quency is detected by the french sub in the signal reflected back to it by the u. s. sub? frenche u. s vus fig. 16-22 problem 32.

It may seem strange that the selected velocity does not depend on either the mass or the charge of the particle. (for example, would the velocity of a neutral particle be selected by passage through this device? ) the explanation of this is that the mass and the charge control the resolution of the device--particles with the wrong velocity will be accelerated away from the straight line and will not pass through the exit slit. if the acceleration depends strongly on the velocity, then particles with just slightly wrong velocities will feel a substantial transverse acceleration and will not exit the selector. because the acc