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A college student who was late for his physics class drove through a red traffic light and was stopped by a patrolling policeman. He is trying to explain the policeman that the red light appeared green to him due to the Doppler effect.
How fast did he need to drive for a Doppler shift this large? (For red light use 677 nm, for green 540 nm as wavelength.)
The current in the circuit if the speed v is 0.75 m/s , determine which end of the rod is positive.
It is possible to produce artificial gravity on a space station by having the station rotate. Explain how this would work. What would be some benefits and drawbacks to this approach?
What percentage of error in would be made if the moment of inertia of the pulley were avoid? Ignore friction in the pulley bearings.
Two loudspeakers in a 20°C room emit 629 Hz sound waves along the x-axis, If the speakers are out of phase, what is the smallest distance between the speakers for which the interference of the sound waves is constructive
A pendulum clock has a period of 0.683 s on Earth. It is taken to another planet and found to have a period of 0.828 s, Find the gravitational field strength on the other planet.
On a banked race track, the smallest circular path on which cars can move has a radius of 102 m, while the largest has a radius 157 m, Find the smallest and largest speed the cars can remove without the presence of friction
A jet is circling an airport control tower at a distance of 22.0 km. Find the distance traveled (in meters) by the jet as the observer watches the nose of the jet cross from one side of the moon to the other
A proton is moving through a magnetic field of strength 2 kT with a speed of 2.5*10^8 m/s, what is the angle between the proton's velocity and the direction of the field
An object is oscilliating on a spring with a period of 4.60 s . At time t= 0.00 s the object has zero speed and is at x = 8.30 cm
Converging lens with plane mirror box somewhere at the left on central axis of converging lens. What is distance between box and lens
An astronomical telescope has an angular magnification of -144, What is the focal length of the eyepiece
A coffee-maker contains a heating element that has a resistance of 34 ohms. What is the current in the heating element
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