Discover how IDNLearn.com can help you find the answers you need quickly and easily. Get accurate and detailed answers to your questions from our dedicated community members who are always ready to help.

Police radar guns measure the speed of moving vehicles by transmitting electromagnetic waves at a vehicle and detecting a Doppler shift in the reflected wave. Suppose a police radar transmits at a frequency of 25.8 GHz and receives a wave reflected from a car moving toward the radar at 63.0 mph. Find the frequency shift Δf = fO − fS (in Hz) between the observed (received) and source (transmitted) frequencies.