A highway patrol officer uses a device that measures the speed of vehicles by bouncing radar off them and measuring the Doppler shift. The outgoing radar has a frequency of 100 GHz and the the effect is small. returning echo has a frequency 20.0 kHz lower. What is the velocity of the vehicle? Note that there are two Doppler shifts in echoes. Be certain not to round off until the end of the problem, because State the magnitude (in m/s). X m/s State the direction. away from the officer toward the officer Additional Materials Reading [0/1 Points] DETAILS PREVIOUS ANSWERS OSCOLPHYS2016 28.5.P.035. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Find the momentum (in kg . m/s) of a helium nucleus having a mass of 6.68 x 10 2 kg that is moving at 0.810c. 27.68e-21 x kg . m/s