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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?
Mercury is poured into the open end of a J-shaped glass tube, which is closed at the short end, trapping air in that end.
A cylindrical cocktail glass 15 em high and 35 cm2 in cross section contains water up to the 10-cm mark.
What temperature must the air in the larger bulb be raised in order that the pressure be doubled?
A thick-walled insulated metal chamber contains ni, moles of helium at high pressure Pi.
Prove that the work done by an ideal gas with constant heat capacities during a quasi-static adiabatic expansion.
When the pressure is atmospheric Po, the piston face is a distance I from the closed end. The gas is compressed by moving the piston a distance x.
If the volume of the tube is V and the pressure P is uniform throughout the tube, show that the equation of state for n moles of gas .
An ideal gas of volume 0.05 ft3 and pressure 120 Ib/in2 undergoes a quasi-static adiabatic expansion until the pressure drops to 15Ib/in2.
At about 0.1 ms after detonation of a 20-kiloton nuclear fission bomb, the "fireball" consists of a sphere of gas with a radius of about 40 ft .
Show that the work done in an isothermal, quasi-static change of state .
How much work is done to change the total magnetization of the material when the temperature is 300 K and when it is 1K?
A gas contained in a cylinder by a layer of styro foam is quickly compressed, the temperature rising several hundred degrees.
During the experiment, the temperature of the water rises. If the system is the mixture of fuel and oxygen.