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 26.8 ghz and receives a wave reflected from a car moving toward the radar at 66.0 mph. find the frequency shift

Which of the following is not a part of a wave? question 2 options: a: frequency b: refraction c: wavelength d: amplitude (whoever answers correctly first gets brainiest! ) ~kayla

Is it possible to use the energy from two atoms colliding to create a clean burning lasting fuel source with a large amount of force? is it also possible to harness that energy from the two atoms colliding to create a clean energy source that will last for years from just two atoms colliding. is there a possibility to control and store that energy for years but slowly let the energy out enough to power cities cheaper and faster.

The percent efficiency of a machine can never be 100% (or greater), because in the real world some energy is always converted into a. heat b. work c. input force d. output force