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In an isothermal decrease of the magnetic field, heat is absorbed from one reservoir and converted completely into work. Is this a violation of the second law?
Prove that it is impossible for two reversible adiabatics to intersect.
Around the Carnot cycle, where point 1 at the beginning of the adiabatic compression has pressure P1 = Po .
Find the heat rejected, the work done by the engine, and the thermal efficiency.
Which is the more effective way to increase the thermal efficiency of a Carnot engine.
uppose that they absorb different amounts of heat from the high temperature reservoir, perform different amounts of work, but reject the same amounts of heat.
Each engine absorbs the heat rejected by the preceding one at the temperature at which it was rejected.
The initial state of 0.1 mol of an ideal monatomic gas is Po = 32Pa and Vo = 8m3 . The final state is P1 = 1 Pa and V1 = 64 m3.
Calculate the temperature ranges on the logarithmic scale and draw a conclusion about efficiency on the logarithmic scale.
Derive the expression for the efficiency of a Carnot engine directly from a TS diagram.
Sketch TS diagrams for the following four ideal gas cycles: Otto; Diesel; a rectangle on a PV diagram.
A current of 10 A is maintained for 1s in a resistor of 25 O while the temperature of the resistor is kept constant at 27°C.
When the water has reached 373 K, what is the entropy change of the water, of the heat reservoir, and of the universe?
Mercury is poured into a U-tube open at both ends until the total length of mercury is h.
The valve is opened slightly, and the helium flows slowly and adiabatically into the container until the pressures on the two sides of the valve are equal.
If the ball is held initially at a position where the air pressure is exactly atmospheric and then allowed to fall, how far will the ball drop.
A ball of mass 16.65 g, placed in the tube of cross-sectional area 2.01 cm2, vibrates with a period of 0.834 s. What is , when the barometer reads 72.3 em?
What is the speed of a longitudinal wave in argon at 293 K?
A standing wave of frequency 1100 Hz in a column of methane at 293 K produces nodes that are 20 cm apart.
.The molar mass of iodine is 127 g. A standing wave in iodine vapor at 400 K produces nodes that are 6.77 cm apart when the frequency is 1000 Hz.
An open glass tube of uniform cross-section is bent into the shape of an L. One arm is immersed in a liquid of density p, and the other arm of length I remains.
Prove that the number of particles striking a unit area of the wall of the container in unit time is equal to N(w)/4V .
In practice, r cannot be made greater than about 10, because if r is larger, then the rise in temperature upon compression of the mixture of gasoline .
The compression ratio of a diesel engine is much larger than that of a gasoline engine, because there is no preignition as only air is being compressed.
All processes are quasi-static, and Cr is constant. Prove that the thermal efficiency of an engine performing this cycle.