Please circle one correct answer for each of the following m

Please circle one correct answer for each of the following multiple choice questions Pressure disturbances travel in the air at the speed of pressure wave the speed of transient air velocity the speed depending on the speed of any valve closure the speed of sound which is a constant value the speed of sound which depends on temperature and gas composition a speed as a function of all the factors listed in A to D above In compressible flows, static temperature is meant by: the temperature that stay constant at all time the temperature measured when the fluid velocity is zero the temperature measured by a thermometer moving with the flowing fluid the temperature measured by a thermometer under a constant hydrostatic pressure the temperature attained if fluid flow is decelerated to zero velocity Mach number is A ratio velocity of air in supersonic condition to the freestream velocity. A ratio of flow velocity past an object/boundary to the local speed of sound. A ratio of the speed of sound to velocity of an object. A ratio of the speed of wave propagation to the velocity of an object. A ratio of the hypersonic speed of an object to a subsonic speed. A ratio of the air velocity to the speed of light Sound wave propagation is a isentropic process which has a special relationship between pressure and density given by p/rho^2 = constant What is k? k is the same as gas constant R as found in the ideal gas law p = rho RT k is the same as relative density rho as found in the ideal gas law p = rho RT k is a ratio between pressure p and density rho k is a constant depending on the type of gas measured at a known pressure and temperature k is a constant for a gas derived by taking a ratio of the pressure and the volume In hypersonic flow, the Mach Number is greater than: 0.3 1.0 2.0 3.0 4.0 5.0 What is the speed of sound in oxygen gas at 15 degree C (For oxygen, R = 260J/kgK and k = 1.4)? 73.8 m/s 74.8 m/s 323.8 m/s 332.8 m/s 333.9 m/s None of the above

Solution

1.E

2.B

3.A .speed of object/speed of sound

4.E

5.F.>5

6.v=(kRT)^(1/2)=323.8..option C