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A) A heat engine does 250 J of work per cycle while exhausting 700 J of heat to the cold reservoir. What is the engine's thermal efficiency?
B) A Carnot engine with a hot-reservoir temperature of 300 degress C has the same thermal efficiency. What is the cold-reservoir temperature in degrees C?
As the fragment falls through the atmosphere, it is heated and some of the material is vaporized, find the composition of this hot vaporized material from the light it emits
A setup similar to the one shown in the figure below is often used in hospitals to support and apply a horizontal traction force to an injured leg. Determine the force of tension in the rope supporting the leg
A satellite is rotating around a planet in a circular orbit. The radius of the orbit to the center of the planet is R = 2.4*107 m, Express the magnitude of the centripetal acceleration of the satellite ac in terms of the speed of the satellite v, an..
A 2.2hp electric motor on a water well pumps water from 14m below the surface. How many liters of water does the motor pump in 2.0hr
The angular momentum of Earth is constant
Illustrate what average power must the winch supply in order to accelerate a 174-kg ultra-light glider from rest to 23.0 m/s over a horizontal distance of 50.0 m? Assume that friction and air resistance are negligible, and that the tension in the ..
Calculate the energies and wavelengths of the 3d to 2p transitions, taking into account the fine structure of both levels
Find the closest distance an alpha particle of kinetic energy 5.0MeV can approach a bare gold nucleus, What is its kinetic energy in eV when it is expelled to infinity
A plastic cylinder of length 38 cm its ends ground to convex (from the rod outward) spherical surfaces, each having radius of curvature 19 cm, How far will the image of the object lie from the right end
at what angle to the vertical does the boy throw the can. What is the period of our orbital motion about the center of Galaxy in Earth years.
An ideal air-filled parallel-plate capacitor has round plates and carries a fixed amount of equal but opposite charge on its plates. how much energy does it now store
A circular wire loop of radius 0.50 m lies in a plane vertical to a uniform magnetic field of magnitude 0.40 T. If in 0.10 s the wire is reshaped from a circle to a square, but remains in the plane, what is magnitude of the average induced emf in t..
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