Engineering, 12.12.2019 06:31 chocolate4550
You are to conduct wind tunnel testing of a new football design that has a smaller lace height than previous designs (see the videos a and b). it is known that you will need to maintain re and st similarity for the testing. based on standard college quarterbacks, the prototype parameters are set at v = 40 mph and ω = 300 rpm. the prototype football has a 7-in. diameter. due to instrumentation required to measure pressure and shear stress on the surface of the football, the model will require a length scale of 2.2: 1 (the model will be larger than the prototype). determine the required
(a) model freestream velocity and
(b) model angular velocity.
Answers: 3
Engineering, 04.07.2019 18:10
The mass flow rate of the fluid remains constant in all steady flow process. a)- true b)- false
Answers: 1
Engineering, 04.07.2019 19:10
Abarometer contains mercury with a density of 13600 kg/m3. atmospheric conditions are 95.8 kpa and 20 °c at 20 °c, the vapor pressure of the mercury is 0.000173 kpa. the column of mercury will rise to a height of most nearly. select one: a)- 0.38 m b)- 0.82 m c)- 0.48 m d)- 0.72 m
Answers: 1
Engineering, 04.07.2019 19:10
With increases in magnification, which of the following occur? a. the field of view decreases. b. the ambient illumination decreases. c. the larger parts can be measured. d. the eyepiece must be raised.
Answers: 1
Engineering, 04.07.2019 19:10
Analyze the factors that influence the choice between the following pairs of processes to make the products indicated: i) sand casting versus die casting of an electric-motor housing ii) thread rolling versus machining of a bolt for high-strength application. (co3/c5)
Answers: 3
You are to conduct wind tunnel testing of a new football design that has a smaller lace height than...
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