Question

Fluid Mechanics Easy Questions:
1) A closed tank having a volume of 2 ft3 is filled with 0.30 lb of a gas. A pressure gauge attached to the tank reads 12 psi when the gas temperature is 80 oF. There is some question as to whether the gas in the tank is oxygen or helium. Which do you think it is? Explain how you arrived at your answer. (oxygen). Thank YOU so MUCH for paying notice to this post!! :D

Answer 1

2. An open, clean glass tube (Ɵ=0°) is inserted vertically into a pan of water. What tube diameter is needed if the water level in the tube is to rise one tube diameter (due to surface tension)? (1.80 x 10-2 ft)

Answer 2

3. An important dimensionless parameter concerned with very high speed flow is the Mach number, defined as V/c where V is the speed of the object such as an airplane or projectile, and c is the speed of sound in the fluid surrounding the object. For a projectile travelling at 800 mph through air at 50°F and standard atmospheric pressure, what is the value of the Mach Number? (1.06)

Answer 3

The kinematic viscosity of oxygen at 20°C and a pressure of 150 kPa (abs) is 0.104 stokes. Determine the dynamic viscosity of oxygen at this temperature and pressure. (2.05 x 10-5 N.s/m2)

Answer 4

5. If 1 cup of cream having a density of 1005 kg/m3 is turned into 3 cups of whipped cream, determine the specific gravity and specific weight of the whipped cream. (3290 N/m3)

Answer 5

For question one, start be converting all units to SI. 1 foot = 0.3048 metres 1 pound = 0.4536 kilograms celsiuses = 5/9*(fahrenheits-32) Now use the ideal gas equation to find the amount of moles of gas in there, find the ratio of the mass of the gas to that, and compare your result to the RAMs given in a periodic table.