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You are walking along a small country road one foggy morning and come to an intersection. While you are crossing, you hear an ambulance siren. As a paramedic, you know that the siren sounds at a frequency of 7.47 kHz. But, as an amateur musician with perfect pitch, you can tell that the frequency you are hearing is actually 6.87 kHz. Is the ambulance moving toward or away from you? At what speed is the ambulance traveling?
Four moles of an ideal gas undergo a reversible isothermal expansion from volume V1 to volume V2 = 5V1 at temperature T = 400K. Find the entropy change of the gas
What is the maximum rate of rotation. A moving electron passes near the nucleus of a gold atom, which contains 79 protons and 118 neutrons. At a particular moment electron is a distance of 7.5 x10 ^9 m from the gold nucleus.
An airplane flies 200 km due west from city A to city B and then 315 km in the direction of 33.0° north of west from city B to city C.
A car is traveling 17 m/s when the driver sees a child standing on the road. He takes 0.8 s to react, then steps on the brakes and slows at 7.5 m/s2. How far does the car go before it stops.
A singly ionized helium atom (He+) has only one electron in orbit about the nucleus. What is the radius of the ion
A mass attached to a spring oscillates with an amplitude of 18.0 cm; the spring constant is k= 17.0N/m. Find the value of the mass
Planet X rotates in the same manner as the earth, around an axis through its north and south poles, and is perfectly spherical. How long is the day on Planet X
For the motion from the initial free until the piece of wood comes to rest, what is the total amount of work completed by friction.
A beam of protons at an accelerator creates a current of 120 mu/A. how many protons strike the target in 30.0 s
Joe is 0.500 m from the right end and weighs 920-N. Given that the scaffold is in rotational and translational equilibrium, what are the forces on each cable.
The crest of the second hill is circular, with a radius of r = 35m. Avoid friction and air resistance. What must be the height h of the first hill so that skier just loses contact with the snow at the crest of the second hill.
In a double-slit experiment, slits separated by 1.240e-4 m are illuminated by a coherent 571 nm light source. What is the angular position of the first bright fringe
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