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For Chinese-language swearing, see Mandarin Chinese profanity. " May you live in interesting times " is an English expression that is claimed to be a translation of a traditional Chinese curse. The expression is ironic: "interesting" times are usually times of trouble. Despite being so common in English as to be known as the " Chinese curse ...
Pyroclastic flows sweep down the flanks of Mayon Volcano, Philippines, in 1984. A pyroclastic flow (also known as a pyroclastic density current or a pyroclastic cloud) [1] is a fast-moving current of hot gas and volcanic matter (collectively known as tephra) that flows along the ground away from a volcano at average speeds of 100 km/h (30 m/s; 60 mph) but is capable of reaching speeds up to ...
In the dynamics of fluid, a vortex is fluid that revolves around the axis line. This fluid might be curved or straight. Vortices form from stirred fluids: they might be observed in smoke rings, whirlpools, in the wake of a boat or the winds around a tornado or dust devil. Vortices are an important part of turbulent flow.
The friction loss in uniform, straight sections of pipe, known as "major loss", is caused by the effects of viscosity, the movement of fluid molecules against each other or against the (possibly rough) wall of the pipe. Here, it is greatly affected by whether the flow is laminar (Re < 2000) or turbulent (Re > 4000): [ 1 ] In laminar flow ...
A turbulent event is a series of turbulent fluctuations that contain more energy than the average flow turbulence. [ 11 ] [ 12 ] The turbulent events are associated with coherent flow structures such as eddies and turbulent bursting, and they play a critical role in terms of sediment scour, accretion and transport in rivers as well as ...
This is a list of English words inherited and derived directly from the Old English stage of the language. This list also includes neologisms formed from Old English roots and/or particles in later forms of English, and words borrowed into other languages (e.g. French, Anglo-French, etc.) then borrowed back into English (e.g. bateau, chiffon, gourmet, nordic, etc.).
This phenomenon is naturally observed behind large emergent rocks in swift-flowing rivers. An eddy is a movement of fluid that deviates from the general flow of the fluid. An example for an eddy is a vortexwhich produces such deviation. However, there are other types of eddies that are not simple vortices.
The double-rod pendulum is one of the simplest dynamical systems with chaotic solutions. Chaos theory is an interdisciplinary area of scientific study and branch of mathematics. It focuses on underlying patterns and deterministic laws of dynamical systems that are highly sensitive to initial conditions.