In the figure, a French submarine and a US submarine move toward each other during maneuvers in motionless water in the North Atlantic. The French sub moves at speed v-52.00 km/h, and the U.S. sub at vus 73.00 km/h. The French sub sends out a sonar signal (sound wave in water) at 1000 x 10 Hz. Sonar waves travel at 5470 km/h. (a) What is the signal's frequency as detected by the US. sub? (b) What frequency is detected by the French sub in the signal reflected back to it by the U.S. sub?

In the figure, a French submarine and a US submarine move toward each other during maneuvers in motionless water in the North Atlantic. The French sub moves at speed v-52.00 km/h, and the U.S. sub at vus 73.00 km/h. The French sub sends out a sonar signal (sound wave in water) at 1000 x 10 Hz. Sonar waves travel at 5470 km/h. (a) What is the signal's frequency as detected by the US. sub? (b) What frequency is detected by the French sub in the signal reflected back to it by the U.S. sub?