Ahighway 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 returning echo has a frequency 15.0 khz higher. 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 the effect is small.

Explanation:

The data we are given is:

V = ?     fo = 100GHz        fs = 100000015KHz    C = 343m/s

With the doppler effect formula we can calculate the frequency perceived by the vehicle as:

    (1)

Then, we sound waves bounce back on the vehicle:

     (2)   Replacing tha value obtained in (1)

  Solving for V:

i had this question and the answer was 3.15 miles.

martina travels from school to her mom's office. from there, she walks to school. after school, she walks to the library and then to a friends house before finally ending back at home. find martina's total distance traveled.

a) 0 miles  

b) 0.4 miles  

c) 1 mile  

d) 3.15 miles

its a 5.5 n

glad that