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A heat engine operates between a high-temperature reservoir at670K and a low-temperature reservoir at 320 K. In one cycle, the engine absorbs4500J of heat from the high-temperature reservoir and does 2200 J ofwork. What is the magnitude of the net change in entropy as a result of this cycle?
J/K
A 102g Frisbee is 25cm in diameter and has half its mass spread uniformly in the disk and the other half concentrated in the rim. What is the Frisbee's rotational inertia
A 2.30 N force pushes it to the left, and a 0.800 N force pushes it to the right. (a) Taking right to be positive, what is the net force acting on it? (b) What is its acceleration?
A subway train has three cars, each weighing 1.20 x 10^5 N. The frictional force on each car is 103 N, and the first car, acting as an engine, exerts a horizontal force of 4.80 x 10^4 N on the rails.
positive freedom is the ability to do what one should do. negative freedom is the ability to do what one should not
Coil 1 has L1 = 47 mH and N1 = 104 turns. Coil 2 has L2 = 68 mH and N2 = 215 turns. The coils are fixed in place; what self-induced emf appears in that coil
Water flows over a waterfall 10 meters to a turbine. Water flows at a rate of 10kg/sec. How much power is delivered to the turbine
Suppose the wheel is rotated at a constant rate so that the mass has an upward speed of 4.67 m/s when it reaches a point P. What is the maximum height, h, the mass will rise above the point P
A baseball (m = 145 g) approaches a bat horizontally at a speed of 40.5 m/s (91 mi/h) and is hit straight back at a speed of 45.9 m/s, what is the average force exerted on the ball by the bat
A cylindrical storage tank has a radius of 1.34 m. When filled to a height of 3.74 m, What is the density of the solvent
A noisy grinding machine in a factory produces a sound intensity of 1.0 x 10^-5 Watts/meter^2. Deteremine the sound intensity level
A particular satellite was placed in a circular orbit about 145 mi above Earth. Determine the time required for one complete revolution
What lengths of ship three sides according to the observer
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