Asubmarine can detect an approaching enemy submarine using sonar. if a stationary submerged submarine emits a 100khz tone and receives a tone doppler shifted by 200hz, calculate the speed of the enemy submarine if the speed of sound in salt water is 1,482m/s. note: because the echo is off of a moving object, the moving object amplifies the doppler effect by a factor of 2! therefore, the speed must be cut in half. a. 1.0m/s b. 1.5m/s c.2.2m/s od.3.3m/s e. 4.4m/s