Physics, 21.03.2020 10:32 melanie7152
Slick Willy is in traffic court (again) contesting a $50.00 ticket for running a red light. “You see, your Honor, as I was approaching the light, it appeared yellow to me because of the Doppler effect. The red light from the traffic signal was shifted up in frequency because I was traveling towards it, just like the pitch of an approaching car rises as it approaches you.”
Calculate how fast Slick Willy must have been driving, in meters per second, to observe the red light (wavelength of 683 nm) as yellow (wavelength of 576 nm). (Treat the traffic light as stationary, and assume the Doppler shift formula for sound works for light as well.)
Answers: 1
Physics, 22.06.2019 06:30
Air initially at 0.75 bar, 1000 k, and occupying a volume of 0.12 m^3 undergoes two processes. process 1-2: the air is compressed isothermally until the volume is halved. process 2-3: the air undergoes a constant pressure process until the volume is halved again. assume ideal gas behavior. a) determine the mass of the air, in kg. b) the work and the heat transfer for each of the two processes, in kj. (100 kj = 1 bar . m^3)
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Physics, 22.06.2019 21:30
In the illustration, which two simple machines are being used to enable the student to reach the door? a. inclined plane and pulley b lever and wheel-and-axle c pulley and lever d wheel-and axle and inclined plane
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Slick Willy is in traffic court (again) contesting a $50.00 ticket for running a red light. “You see...
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