1. The reason for the flight of the aircraft is that it is driven by the airflow from the lower part of the wing. () 2. Since the units on both sides of the hydrodynamic formula are required to be the same, the dimensions on both sides are also the same. ( ) 3. Euler's analysis method is to track the motion of a single particle in the fluid and obtain the law of its motion. ( )
1. The reason for the flight of the aircraft is that it is driven by the airflow from the lower part of the wing. () 2. Since the units on both sides of the hydrodynamic formula are required to be the same, the dimensions on both sides are also the same. ( ) 3. Euler's analysis method is to track the motion of a single particle in the fluid and obtain the law of its motion. ( )
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
Related questions
Question
Fluid mechanics.from question 1 to 6 and from question 1 to 3

Transcribed Image Text:(Ture or false. If the statement is right, please mark right with 'T',
otherwise, if the one is wrong, please mark wrong with 'F'.
1. The reason for the flight of the aircraft is that it is driven by the airflow from the lower part of the
wing. ( )
2. Since the units on both sides of the hydrodynamic formula are required to be the same, the
dimensions on both sides are also the same. ( )
3. Euler's analysis method is to track the motion of a single particle in the fluid and obtain the law
of its motion. (O
4. The pressure difference on the surface of a droplet can be obtained by the surface tension and the
radius of the droplet Ap = Y/R. ()
%3D
5. According to the correlation between fluid flow and time, it can be divided into steady fluid and
unsteady fluid. ( )
6. When the center of gravity of the body is below the center of buoyancy, the body is in stable
equilibrium. ( )

Transcribed Image Text:(Fill in the blank.
1. In general, velocity V is a vector function of position and time, a lot of physical quantities about
velocity, their dimensions are:
{Vdr, {r}=.
(a) Displacement vector: r =
(b) Acceleration: a =
-dV/dt, {a}=.
(c) Volume rate of flow: Q= [(V n)dA, {Q}=
2. For non-Newtonian fluids, there are many complex physical phenomena:
(а) А
or shear-thickening, fluid increases resistance with increasing applied stress.
(b) А
or shear-thinning, fluid decreases resistance with increasing applied stress.
(c) Fluids require a gradually increasing shear stress to maintain a constant strain rate and are
called
(d) Fluids require a gradually decreasing shear stress to maintain a constant strain rate and are
called
3. There are classic flow patterns:
(а) А
is a line everywhere tangent to the velocity vector at a given instant.
(b) А
is the actual path traversed by a given fluid particle.
(c) A
is the locus of particles which have earlier passed through a prescribed point.
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