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A Carnot engine operates between temperatures of 700 and 369 K. To improve the efficiency of the engine, it is decided either to raise the temperature of the hot reservoir by 39 K or to lower the temperature of the cold reservoir by 39 K. Which change gives the greatest improvement?
Two long parallel wires carry currents of 3.85 A and 4.31 A. The magnitude of the force per unit lengh acting on each wire is 3.77 Ã- 10-5 N/m
A 200 g block attached to a horizontal spring is oscillating with an amplitude of 2.0 cm and a frequency of 4.0 Hz. What is the new amplitude
A 29 g rifle bullet travelling 270 m/s buries itself in a 3.50 kg pendulum hanging on a 2.6 m long string, which makes pendulum swing upward in an arc. Find out the horizontal component of the pendulum's displacement.
A container of volume 0.30 m3 contains 3 mol of argon gas at 31°C. suppose argon behaves as an ideal gas, find the total internal energy of the gas.
A concave shaving mirror has a radius of curvature of 40.1 cm. How far is the mirror from the man's face
what is the final equilibrium temperature of the system?
A 20.0 ?, 9.00 ?, and 9.00 ? resistor are connected in parallel to an emf source, What is the potential difference across the source
A truck rests on a bridge span whose length between support is 120 feet. Find the upward force exerted by each support pier on the bridge
Two fun-loving otters are sliding toward each other on a muddy (and hence frictionless) horizontal surface. One of them, of mass 8.00kg, How much mechanical energy dissipates during this play
You have two containers of a monatomic ideal gas that are intially at the same Pressure, Volume, and Temperature. What is the difference in work done in these processes, 1 - 2
An advertisement shows a 1239 kg car slowly pulling at constant speed a large passenger airplane to demonstrate the power of its newly-designed 79.7-hp (horsepower) engine, How much work is performed by the car on the airplane during this time
A hollow metal sphere has inner radius a, outer radius b, and conductivity sigma. Evaluate the electric field strength at the inner surface of a copper sphere if 0.70cm and 28A
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