An isentropic process is one that is both:
Explanation
This question tests the definition of an isentropic process, a key concept that bridges thermodynamics and compressible flow analysis, as explained in Section 4.6. Isentropic relations are powerful tools for analyzing high-speed flows.
Other questions
According to the fundamental principles discussed, what are the two simple natural sources that give rise to the total aerodynamic force on a body?
What is the definition of pressure in the context of a flowing gas?
The air pressure and density at a point on a wing are 1.10 x 10^5 N/m^2 and 1.20 kg/m^3, respectively. Using a specific gas constant for air of R = 287 J/(kg)(K), what is the temperature at that point?
What is the primary function of the horizontal and vertical stabilizers on a conventional airplane?
What is the key distinction between a conventional airplane configuration and a canard configuration?
The National Advisory Committee for Aeronautics (NACA) was created by an act of U.S. Congress in what year?
A flow is defined as incompressible if which of the following properties is always constant?
An F-117A has a wing loading of 280.8 kgf/m^2. Given that 1 kgf = 9.8 N, 1 lb = 4.448 N, and 1 ft = 0.3048 m, calculate the wing loading in lb/ft^2.
What is the primary purpose of the fairing at the top of a conventional rocket booster like the Delta rocket?
What is the relationship between a slug and a pound mass (lbm)?
Which part of a conventional airplane controls the rolling motion around the fuselage?
The temperature is -100 degrees Celsius. What is this temperature in Kelvin, the absolute temperature scale required for the equation of state?
The Space Shuttle is flying at 28,500 ft density altitude. According to App. B, the density is 0.9408 x 10^-3 slug/ft^3. At the same time, the pressure altitude is 30,000 ft, corresponding to a pressure of 629.66 lb/ft^2. What is the actual outside air temperature in degrees Rankine?
What is specific volume, denoted by v?
Why were biplanes a popular configuration over monoplanes in the early years of aviation until about 1935?
What is the defining characteristic of a recoverable launch vehicle, such as the experimental X-34, compared to an expendable one like the Delta rocket?
What was the purpose of the first action of the newly formed National Advisory Committee for Aeronautics (NACA) in 1915?
A Piper Cub is flying at 60 mi/h. What is its velocity in ft/s?
What is the name of the center body of an airplane where most of the usable volume is found and which carries the payload?
Why do most modern high-speed aircraft have swept wings?
A net force of 17,438 lb is required to accelerate an F-117A at a certain rate. If the F-117A's weight is 52,315 lb, what is its mass in slugs? Use g = 32.2 ft/s^2.
What is a 'three-view diagram' commonly used for in aeronautics?
In the context of the Voyager 2 spacecraft, what is meant by a 'geostationary orbit'?
Which law of physics is the hydrostatic equation (dp = -ρg dhG) based on?
What is the primary function of the control surface known as the elevator?
One horsepower is defined as 33,000 ft-lb/min. What is the equivalent value in the consistent units of ft-lb/sec?
When the National Aeronautics and Space Administration (NASA) was formed in 1958, what happened to its predecessor, NACA?
A convergent duct has an inlet area of 5 m^2 and an exit area of 1.67 m^2. If air enters at a low speed of 10 m/s, what is the exit velocity, assuming incompressible flow?
What is the defining feature of a streamline in a flow field?
In the English engineering system of units, what are the consistent units for force, mass, length, and time?
What is the primary aerodynamic difference between a swept-forward wing and a swept-back wing?
An airplane cabin has an internal volume of 1800 m^3. The air inside is at a density of 1.1 kg/m^3 and is completely recirculated every 20 minutes. What is the mass flow rate of the air in kg/s?
The TRW FLTSATCOM is a communications satellite. What is the function of its two large solar array arms?
A perfect gas is defined as one in which what forces are negligible?
A flow of air at a pressure of 2116 lb/ft^2 is moving at 146.7 ft/s. At point A on an airfoil, the pressure is 2070 lb/ft^2. Assuming incompressible flow with a constant density of 0.002377 slug/ft^3, what is the velocity at point A?
What is the function of the rudder on a conventional airplane?
Air flows into a convergent duct at 700 ft/s with a density of 0.002 slug/ft^3. It exits at 1070 ft/s. What is the density at the exit if the inlet area is 3 ft^2 and the exit area is 2.57 ft^2?
The Mars Pathfinder spacecraft used an aeroshell and backshell during its entry into the Martian atmosphere. What was the primary function of this aerodynamic entry body?
An airplane is flying where the outside air temperature is 15 degrees Celsius. To use this in the equation of state with SI units, what must the temperature be converted to?
What is the primary reason the text advises always to use consistent units in calculations?
What is a major advantage of a canard configuration over a conventional configuration, as hinted at in Chapter 7?
One horsepower is equivalent to 746 watts. An engine produces 4700 hp of excess power. What is this power in watts?
The Space Shuttle's flight system consists of the orbiter, two solid rocket boosters (SRBs), and an external tank. Which of these components are recovered and refurbished for reuse?
A flow of air moves over an airfoil. If the flow is incompressible and inviscid, what equation relates the pressure and velocity between two different points on a streamline?
Why is it stated that an airplane designer's job is an 'exercise in compromise'?
For a perfect gas, the internal energy per unit mass, e, and the enthalpy per unit mass, h, are functions of what single property?
At a point in a flow, the velocity is 600 m/s and the local speed of sound is 300 m/s. What is the Mach number at this point?
What does the term 'static pressure' refer to in a moving fluid?
The speed of sound in a perfect gas depends only on which property?