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Sketch TS diagrams for the following four ideal gas cycles: Otto; Diesel; a rectangle on a PV diagram.
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.
Prove that the thermal efficiency of an engine performing this cycle.
Assuming constant heat capacities, show that the thermal efficiency is ? =1 - ? (V1/V2)-1 / (P3/P2) - 1.
Indicate which parts of the cycle involve heat flow into the gas, and calculate the amount of heat flowing into the gas in one cycle.
The helium is now expanded adiabatically to 3 K. How much work is done, and what is the new internal energy?
The battery remains at constant temperature by receiving heat from the outside air.
If the body remains at constant pressure, show that the time for the temperature of the body to change from TI to T2.
Completely surrounding the helium can are walls maintained at the temperature of liquid nitrogen (77.35 K).
Assuming that all the energy supplied was radiated and that the radiation from the glass tube is negligible, calculate the melting temperature of copper.
The solar constant is the incident energy per unit of time on a unit area of a surface placed at right angles to a sunbeam just outside the earth's atmosphere.
A stream of air moves with a speed w. Assume that a mass m of air is stopped adiabatically by an obstacle.
What is the height of the air column when mercury starts to spill over the top of the cylinder?