Dragon's Breath behaves strangely on water
This is lycopodium powder. It's the spores of club moss and it has amazing properties
Variations In Atmospheric Oxygen Levels Shaped Earth’s Climate Through The Ages
Variations in the amount of oxygen in Earth's atmosphere significantly altered global climate throughout the planet's history. Efforts to reconstruct past climates must include this previously overloo...
Variations In Atmospheric Oxygen Levels Shaped Earth’s Climate Through The Ages
Variations in the amount of oxygen in Earth's atmosphere significantly altered global climate throughout the planet's history. Efforts to reconstruct past climates must include this previously overloo...
Surfactant
Surfactants are compounds that lower the surface tension (or interfacial tension) between two liquids or between a liquid and a solid. Surfactants may act as detergents, wetting agents, emulsifiers, f...
Surfactant - Wikipedia
Underwater vision
Light rays bend when they travel from one medium to another; the amount of bending is determined by the refractive indices of the two media. If one medium has a particular curved shape, it functions a...
Underwater vision - Wikipedia
Partial pressure
In a mixture of gases, each gas has a partial pressure which is the hypothetical pressure of that gas if it alone occupied the volume of the mixture at the same temperature. The total pressure of an ...
Capillary surface
In fluid mechanics and mathematics, a capillary surface is a surface that represents the interface between two different fluids. As a consequence of being a surface, a capillary surface has no thickne...
Capillary surface - Wikipedia
Atmospheric pressure
Atmospheric pressure is the force per unit area exerted on a surface by the weight of air above that surface in the atmosphere of Earth (or that of another planet). In most circumstances atmospheric p...
Atmospheric pressure - Wikipedia
Permeation
In physics and engineering, permeation (also called imbuing) is the penetration of a permeate (such as a liquid, gas, or vapor) through a solid. It is directly related to the concentration gradient o...
Permeation - Wikipedia
Pressure sensor
A pressure sensor measures pressure, typically of gases or liquids. Pressure is an expression of the force required to stop a fluid from expanding, and is usually stated in terms of force per unit are...
Pressure sensor - Wikipedia
Fluid statics
Fluid statics or hydrostatics is the branch of fluid mechanics that studies fluids at rest. It embraces the study of the conditions under which fluids are at rest in stable equilibrium; and is contra...
Fluid statics - Wikipedia
Torricellian chamber
In cave diving, a Torricellian chamber is a cave chamber with an airspace above the water at less than atmospheric pressure. This is formed when the water level drops and there is no way for more air ...
Torricellian chamber - Wikipedia
Polyethoxylated tallow amine
Polyethoxylated tallow amine (POEA) is a surfactant that enhances the activity of herbicides such as glyphosate. The role of a surfactant in a herbicide product is to improve wettability of the hydro...
Polyethoxylated tallow amine - Wikipedia
Hydrophobe
Cutting a water droplet using a superhydrophobic knife on superhydrophobic surfacesIn chemistry, hydrophobicity is the physical property of a molecule (known as a hydrophobe) that is seemingly repel...
Hydrophobe - Wikipedia
Ambient pressure
The ambient pressure on an object is the pressure of the surrounding medium, such as a gas or liquid, which comes into contact with the object.
Within the atmosphere, the ambient pressure decrease...
Surfactants in paint
Paint has four major components: pigments, binders, solvents, and other additives. Pigments serve to give paint its color, texture, toughness, as well as determining if a paint is opaque or not. Commo...
Surfactants in paint - Wikipedia
Neutral buoyancy
Neutral buoyancy is a condition in which a physical body's average density is equal to the density of the fluid in which it is immersed. The buoyancy offsets the force of gravity that would otherwise ...
Neutral buoyancy - Wikipedia
Psychrometric constant
The psychrometric constant relates the partial pressure of water in air to the air temperature. This lets one interpolate actual vapor pressure from paired dry and wet thermometer bulb temperature ...
Pressure
Pressure (symbol: p or P) is the force applied perpendicular to the surface of an object per unit area over which that force is distributed. Gauge pressure (also spelled gage pressure) is the pressure...
Pressure - Wikipedia
Surfactin
Surfactin is a very powerful surfactant commonly used as an antibiotic. It is a bacterial cyclic lipopeptide, largely prominent for its exceptional surfactant power. Its amphiphilic properties help th...
Surfactin - Wikipedia
Ultrahydrophobicity
Superhydrophobic surfaces are highly hydrophobic, i.e., extremely difficult to wet. The contact angles of a water droplet exceeds 150° and the roll-off angle/contact angle hysteresis is less than 10°....
Ultrahydrophobicity - Wikipedia
Supersaturation
Supersaturation is a state of a solution that contains more of the dissolved material than could be dissolved by the solvent under normal circumstances. It can also refer to a vapor of a compound that...
Supersaturation - Wikipedia
Back pressure
Back pressure refers to pressure opposed to the desired flow of a fluid in a confined place such as a pipe. It is often caused by obstructions or tight bends in the confinement vessel along which it i...
Barometer
A barometer is a scientific instrument used in meteorology to measure atmospheric pressure. Pressure tendency can forecast short term changes in the weather. Numerous measurements of air pressure are...
Barometer - Wikipedia
Thonzonium bromide
Thonzonium bromide is a monocationic detergent. A solution of it is thus a surfactant and a detergent that promotes tissue contact by dispersion and penetration of the cellular debris and exudate of t...
Solubility table
The table below provides information on the variation of solubility of different substances (mostly inorganic compounds) in water with temperature, at 1 atmosphere pressure. Units of solubility are g...
Sodium nonanoyloxybenzenesulfonate
Sodium nonanoyloxybenzenesulfonate (NOBS) is an important component of laundry detergents and bleaches. It is known as a bleach activator for active oxygen sources, allowing formulas containing hydro...
Sodium nonanoyloxybenzenesulfonate - Wikipedia