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A parked police car emits a sound of frequency 1348 Hz that bounces off a car and returns with a frequency of 1387 Hz. The police car is parked on the side walk of a road so the moving car is traveling directly toward or away from it.
(a) How fast was the moving car going? Was it moving toward or away from the police car?
(b) What frequency would the police car have received if it had been traveling toward the other car at 20.0 m/s?
Two balls hit in an elastic collision. Both balls initially have the same speed but opposite directions (before the collision), What is the velocity of both balls after they collide
A dry cell does 7.5. J of work through chemical energy transfer 5 C between terminals of the cell. What is the electric potential between the two terminal.
Draw from your own experience working within a group with the goal of achieving a specific task. You may use your experience as a student working in a group, or develop a plan for a future learning team. Include specific items requiring group disc..
The 210 A current through a spark plug moves 0.270 mC of charge. How long does the spark last
the siren of a fire engine that is driving northward at 30.0 m/s emits a frequency of 2000 Hz. A truck in front of this fire engine is moving northward at 20.0 m/s. what frequency does the truck driver hear
A certain type of laser emits light that has a frequency of 7.4x 1014 Hz. The light, however, occurs as a series ofshort pulses, each lasting for a time of 4.4 x 10-11 s.(a) How many wavelengths are there in one pulse?
A spring has a spring stiffness constant, k, of 430 N/m. Obtain how much must this spring be stretched to store 50 Joule of potential energy
A uniform steel beam has a mass of 720kg On it is resting half of an identical beam, What is the vertical support force at each end
A hydrogen atom is in the ground state. It absorbs energy and makes a transition to the n = 6 excited state. What are the photon wavelengths of transitions
Volcanoes emit much hydrogen sulfide gas, H2S, which reacts with the oxygen in the air to form water and sulfur dioxide, SO2. Every 68 tons of H2S reacts with 96 tons of oxygen and forms 36 tons of water. How many tons of SO2 are formed?
A diverging lens (f = -11.5 centimeter) is placed 20.0 centimeter to the left of a converging lens (f =30.5 centimeter). Find what is the height of the final image
Two traveling sine waves, identical except for a phase difference of phi, What is the phase difference between the two waves
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