# have+an+unsteady+motion

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**To have the wind**— Wind Wind (w[i^]nd, in poetry and singing often w[imac]nd; 277), n. [AS. wind; akin to OS., OFries., D., & G. wind, OHG. wint, Dan. & Sw. vind, Icel. vindr, Goth winds, W. gwynt, L. ventus, Skr. v[=a]ta (cf. Gr. ah ths a blast, gale, ah^nai to… …2

**vacillate**— v. n. 1. Sway, rock, move to and fro, have an unsteady motion, waver. 2. Waver, fluctuate, hesitate, be inconstant, be unsettled, be unsteady, play fast and loose, blow hot and cold, box the compass, run with the hare and hunt with the hound, be… …3

**Navier–Stokes equations**— Continuum mechanics …4

**Tidal bore**— Aegir redirects here. For the mythological figure, see Ægir. For the moon of Saturn, see Aegir (moon). The tidal bore in Upper Cook Inlet, Alaska A tidal bore (or simply bore in context, or also aegir, eagre, or eygre) is a tidal phenomenon in… …5

**Fluid dynamics**— Continuum mechanics …6

**Bernoulli's principle**— This article is about Bernoulli s principle and Bernoulli s equation in fluid dynamics. For Bernoulli s Theorem (probability), see Law of large numbers. For an unrelated topic in ordinary differential equations, see Bernoulli differential… …7

**Insect wing**— Original veins and wing posture of a dragonfly. Hoverflies hovering to mate …8

**Computational fluid dynamics**— Computational physics Numerical analysis …9

**Insect flight**— Insects are the only group of invertebrates known to have evolved flight. Insects possess some remarkable flight characteristics and abilities, still far superior to attempts by humans to replicate their capabilities. Even our understanding of… …10

**D'Alembert's paradox**— In fluid dynamics, d Alembert s paradox (or the hydrodynamic paradox) is a contradiction reached in 1752 by French mathematician Jean le Rond d Alembert.[1] D Alembert proved that – for incompressible and inviscid potential flow – the drag force… …11

**Charles Redheffer**— A diagram of Redheffer s first machine Charles Redheffer was an American inventor who claimed to have invented a perpetual motion machine. First appearing in Philadelphia, Redheffer exhibited his machine to the public, charging high prices for… …12

**Hyperkinesia**— This article is about hyperkinesia, the pathologically increased muscular movement. For hyperkinesis, hyperactivity often seen in children, see Hyperkinesis. Hyperkinesia Basal ganglia and its normal pathways. This circuitry is often disrupted in …13

**Micro air vehicle**— Naval Air Weapons Station China Lake, California A Micro Air Vehicle (MAV) flies over a simulated combat area during an operational test flight. The MAV is in the operational test phase with military Explosive Ordnance Disposal (EOD) teams to… …14

**Vortex induced vibration**— Vortex induced vibrations (VIV) are motions induced on bodies facing an external flow by periodical irregularities on this flow. The classical example is the VIV of an underwater cylinder. You can see how this happens by putting a cylinder into… …15

**photography, technology of**— Introduction equipment, techniques, and processes used in the production of photographs. The most widely used photographic process is the black and white negative–positive system (Figure 1 >). In the camera the lens projects an image of… …16

**Depth of field**— The area within the depth of field appears sharp, while the areas in front of and beyond the depth of field appear blurry …17

**Jumping position**— The jumping position is a position used by equestrians when jumping over an obstacle. It usually involves what is known as the forward seat or 2 point because the rider has 2 points in contact with the horse; the legs and hands. It was first… …18

**Rowing (sport)**— All eight types of racing boats, six of which are part of the Olympic Games Rowing is a sport in which athletes race against each other on rivers, on lakes or on the ocean, depending upon the type of race and the discipline. The boats are… …19

**Cephalopod**— Cephalopods Temporal range: Devonian – Recent[1] (Stem groups from Cambrian)[2] …20

**Airy wave theory**— In fluid dynamics, Airy wave theory (often referred to as linear wave theory) gives a linearised description of the propagation of gravity waves on the surface of a homogeneous fluid layer. The theory assumes that the fluid layer has a uniform… …