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The siren in an ambulance has a frequency (according to you) of 1095 Hz as it moves toward you at speed v. It then makes a U-turn and travels away from you with speed v, and you hear a frequency of 925 Hz. What is the final speed v of the siren?
A hunter is standing on flat ground between two vertical cliffs that are directly opposite one another. He is closer to one cliff than the other. find the distance (in m) between the cliffs
Two point charges are located on the x axis. The first is a charge +Q at x = ?a. The second is an unknown charge located at x = +3a. What are the two possible values of the unknown charge
For NaCl compute (a) the energy in eV necessary to excite the first rotational state and (b) the wavelength and frequency of the photon emitted in the transition back to the ground state
A uniform diving board, of length 5.21 m and mass 50.4 kg, is supported at two points; one support is located L1 = 3.32 m from the end of the board and the second is at 4.89 m from the end. What is the force acting on the board due to the right sup..
2.00 mol of a monaromic gas at atmospheric pressure has a total internal energy of 7.48x10^3J. What is the volume occupied a rigid cylinder by the gas
An ideal gas has a pressure of 2.5 atm, a volume of 1.0L at at temperature of 30 degrees Celcius. How many molecules are there in the gas
Communications satellites are placed in a circular orbit where they stay directly over a fixed point on the equator as the earth rotates. find the speed of a satellite in geosynchronous orbit
A disk with moment of inertia I1 rotates about a frictionless vertical axle with angular speed wi. find the ratio of the final to the initial rotational energy
An aircraft engine takes in an amount 9000 of heat and discards an amount 6400 each cycle. What is the mechanical work output of the engine during one cycle
A jet airliner moving initially at 300 mi/h due east enters a region where the wind is blowing at 100 mi/h in a direction 28.0° north of east. What is the new velocity of the aircraft
Two astronauts are, 4.86 m apart in their spaceship, speaking to each other. How far away from the Earth is the spaceship
Determine the magnitude of the emf EMF induced in the loop after exactly time 6.00 s has passed since the circumference of the loop started to reduce.
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