Viscous drag Study guides, Revision notes & Summaries

AEA Water Chapter 6(question and answers)graded A+ 2023In the water, the level of exercise is a function of what FIVE factors? - correct answer (1) Speed of movements; (2) Rate of change in speed (acceleration); (3) Surface area (frontal resistance) in the direction of the motion; (4) The participant's and the water's inertia; and (5) The number of times you change direction How is motion in the aquatic environment affected by the water's viscosity? - correct answer Water is more visc...

Accelerate-stop distance available (ASDA) The runway plus stopway length declared available and suitable for the acceleration and deceleration of an airplane aborting a takeoff. ACN-PCN Refers to the Aircraft Classification Number - Pavement Classification Number method. This method is structured so a pavement with a particular PCN value can support, without weight restrictions, an airplane that has an ACN value equal to or less than the pavement's PCN value. This is possible because ACN a...

Skin friction - correct answer i. Viscous drag in the boundary layer ii. Friction of the fluid (air) against the object's "skin" (auto body) Form Drag - correct answer i. Caused by pressure differential in front of/behind vehicle as viewed by the air stream. ii. Keys for reducing: continuous streamlines, avoiding flow separation. Contributors to drag - correct answer Forebody, Afterbody, Underbody, Skin friction, wheels and wheel wells, drip rails, window recesses, external mirrors, e...

The University of Texas Rio Grande Valley College of Engineering and Computer Science Department of Civil Engineering CIVE 3115 Fluid Mechanics & Hydraulics Laboratory Fall 2018 Laboratory Section # 311 Background and Theory: A boundary layer is a thin region that takes into account both viscous and inertial effects. Because of the presence of viscous effects, Euler's equation fails in this region. The Reynolds number determines whether a boundary layer is laminar or turbulent. ...

AEA Water - Chapter 6 question with complete solution 2023 Viscosity - correct answer Refers to the friction between molecules of a liquid or gas, causing the molecules to tend to adhere to each other (cohesion) and in water to a submerged body (adhesion). How is motion in the aquatic environment affected by the water's viscosity? - correct answer Water is more viscous than air. This friction between molecules, or water's friction, is what causes resistance to motion when exercising. A com...

Atmosphere: Properties, standard atmosphere. Classification of aircraft. Airplane (fixed wing aircraft) configuration and various parts. Pressure altitude; equivalent, calibrated, indicated air speeds; Primary flight instruments: Altimeter, ASI, VSI, Turn-bank indicator. Angle of attack, sideslip; Roll, pitch & yaw controls. Aerodynamic forces and moments. Airplane Performance: Drag polar; take-off and landing; steady climb and descent; absolute and service ceiling; range and endurance, loa...

Atmosphere: Properties, standard atmosphere. Classification of aircraft. Airplane (fixed wing aircraft) configuration and various parts. Pressure altitude; equivalent, calibrated, indicated air speeds; Primary flight instruments: Altimeter, ASI, VSI, Turn-bank indicator. Angle of attack, sideslip; Roll, pitch & yaw controls. Aerodynamic forces and moments. Airplane Performance: Drag polar; take-off and landing; steady climb and descent; absolute and service ceiling; range and endurance, loa...

What is the reason for multi-staging compared to single stage rockets? 1. Higher payload ratio for same velocity increment 2. Higher attainable velocity for same payload ratio Which forces need to be taken into account to calculate a launch vehicles trajectory at lift-off? 1. Atmospheric drag force 2. Gravitational force 3. Thrust Force Why is the Hohmann transfer orbit considered most fuel efficient to go from Earth orbit to Mars orbit? Velocity increments are collinear to o...

Which of the following statements regarding energy is true? - ANSWER d. Kinetic energy can be traded for potential energy, and potential energy can be traded for kinetic energy The objective in maneuvering the airplane is to manage energy so that: - ANSWER d. All of the above What is the effect on total drag if airspeed slows below L/D Max? - ANSWER c. Drag increases because of increased induced drag. A jet pilot flying at L/D Max will obtain best: - ANSWER b. Endurance When a jet ai...

Linx Refresher Review IPD PPD REFRESHERS TRIVIA EXAMINATION (Linx Refreshers Trivia Examination) Prepared by: Engr. Jose R. Francisco, PME August 2012 MULTIPLE CHOICE QUESTIONS INSTRUCTION: Select the correct answer for each of the following questions. Mark only one answer for each item by shading the box corresponding to the letter of your choice on the answer sheet provided. STRICTLY NO ERASURES ALLOWED. Use pencil No. 1 only. 1. A vertical cylindrical tank contains water. What is the ...