# Bernoulli's principle: Quiz

Question 1: The streamline must not enter a ________.
Fluid mechanicsNavier–Stokes equationsDrag (physics)Boundary layer

Question 2: These two devices are connected to the ________ which determines the dynamic pressure of the airflow past the aircraft.
Pitot-static systemPitot tubeFlight instrumentsAirspeed indicator

Question 3: At higher flow speeds in gases, or for ________ waves in liquid, the changes in mass density become significant so that the assumption of constant density is invalid.
Sound pressureSoundParticle velocityFrequency

Question 4: Also the gas density will be proportional to the ratio of pressure and absolute ________, however this ratio will vary upon compression or expansion, no matter what non-zero quantity of heat is added or removed.
Thermodynamic temperatureTemperatureWater vaporLightning

Question 5: For example, if the air flowing past the top surface of an aircraft wing is moving faster than the air flowing past the bottom surface then Bernoulli's principle implies that the ________ on the surfaces of the wing will be lower above than below.
PressureForceTemperaturePressure measurement

Question 6: ________ - applied fluid mechanics for liquids
Islamic Golden AgeMuslim Agricultural RevolutionHydraulicsAl-Jazari

Question 7: In this case the equation can be used if the flow speed of the gas is sufficiently below the ________, such that the variation in density of the gas (due to this effect) along each streamline can be ignored.
Specific heat capacityAcoustic impedanceHeliumSpeed of sound

Question 8: The Bernoulli equation for unsteady potential flow is used in the theory of ocean surface waves and ________.
OpticsClassical mechanicsPhysicsAcoustics

Question 9: Dynamic pressure is the difference between stagnation pressure and ________.
Static pressureFluid dynamicsPitot-static systemBernoulli's principle

Question 10: Here w is the ________ per unit mass, which is also often written as h (not to be confused with "head" or "height").
EnthalpyHelmholtz free energyGibbs free energyInternal energy