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Practical steam engines utilize 450°C steam, which is later exhausted at 250°C. Explicitly show how you follow the steps in the Problem-Solving Strategy for thermodynamics found on pages 361-2 when answering the questions below. (Do this on paper. Your instructor may ask you to turn in this work.)
(a) What is the maximum efficiency that such a heat engine can have?
%
(b) Since 250°C steam is still quite hot, a second steam engine is sometimes operated using the exhaust of the first. What is the maximum efficiency of the second engine if its exhaust has a temperature of 150°C?
(c) What is the overall efficiency of the two engines?
(d) Show that this is the same efficiency as a single Carnot engine operating between 450°C and 150°C.
An unknown material has a normal melting/freezing point of -26.3 ° C, and the liquid phase has a specific heat capacity of 160 J/(kg · C °). What is the latent heat of fusion of the unknown material
Birds resting on high-voltage power lines are a common sight. The copper wire on which a bird stands is 2.5 cm in diameter and carries a current of 48 A. calculate the potential difference between its feet
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A small coil of 40 turns and a surface area 30 cm^2 has its plane perpendicular to a magnetic field B=0.5T. how much charge passes through the coil
An electron acquires 5.95×10?16J of kinetic energy when it is accelerated by an electric field from plate A to plate B
A physicist uses a cylindrical metal can 0.210m high and 0.075m in diameter to store liquid helium at 4.22 K; How much helium is lost per hour? The emissivity of the metal can is 0.200
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A damping force acts on the egg, and the amplitude of the motion decreases to 0.101 in a time of 5.00 compute the magnitude of the damping constant b.
In proton-antiproton annihilation, a proton and an antiproton (a negatively charged particle with the mass of a proton) collide and disappear, producing electromagnetic radiation, Find the total energy of the radiation
A muon is produced by a collision between a cosmic ray and an oxygen nucleus in the upper atmosphere at an altitude of 50 km, What is the velocity of a muon at the surface
A cardinal (Richmondena cardinalis) of mass 3.60×10-2 and a baseball of mass 0.146 have the same kinetic energy. What is the ratio of the cardinal's magnitude of momentum to the magnitude of baseball's momentum.
There is an electric field of 113N/C directed along the + x axis. If the string makes an angle 26 degrees with the y axis when the sphere is in stability, what is the charge on the sphere.
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