15.Radar detectors use radio waves to measure the speed of moving vehicles Radar detectors have a wavelength of 1.8 meters. What is the frequency of
waves from a radar detector?
A 3.7 X 10^-34 Hz
B 6.0 X 10^-9 Hz
C 5.4 X 10^8 Hz
D 1.7 X 10^8 Hz

Option D:1.7 × 10^(8) Hz

Explanation:

We are given wavelength; λ = 1.8 m

To find the frequency, we will us the formula; v = fλ

Thus; f = v/λ

Where v is speed of light = 3 × 10^(8) m/s

Thus;

f = (3 × 10^(8))/1.8

f = 1.7 × 10^(8) Hz

So correct answer is Option D

for step 7 table c on the lab "newtons law of action"   the average time it took the car to travel .25 meters   was 1.92 seconds.

the average time it took the car to travel 0.50 meters was 2.61 seconds

hope this : )