Astate trooper's car sends out a radar signal at a frequency of 10.4 ghz. find the wavelength of this signal. the wave speed is 2.998 × 108 m/s.

The wavelength is related to the frequency and the speed of a wave by the following relationship:

where
is the wavelength
v is the speed of the wave
f is its frequency

The radio signal in our problem has a frequency of

and a speed of


Therefore, we can use the previous formula to find its wavelength:

There are several information's already given in the question. Based on those given information's, the answer can be easily deduced.
Equivalent resistance = 5 + 2 + 12
                                   = 19 ohms

From the above deduction, it can be deduced that the correct option among all the options that are given in the question is the first option or option "A". I hope that this is the answer that has actually come to your desired help.