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Liquid Bubble
A bubble is a globule of one substance in another, usually gas in a liquid. Due to the Marangoni effect, bubbles may remain intact when they reach the surface of the immersive substance. Common examples Bubbles are seen in many places in everyday life, for example: * As spontaneous nucleation of supersaturated carbon dioxide in soft drinks * As water vapor in boiling water * As air mixed into agitated water, such as below a waterfall * As sea foam * As a soap bubble * As given off in chemical reactions, e.g., baking soda + vinegar * As a gas trapped in glass during its manufacture * As the indicator in a spirit level Physics and chemistry Bubbles form and coalesce into globular shapes because those shapes are at a lower energy state. For the physics and chemistry behind it, see nucleation. Appearance Bubbles are visible because they have a different refractive index (RI) than the surrounding substance. For example, the RI of air is approximately 1.0003 and the RI of water ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Isla De Corbera, Santander, España, 2019-08-15, DD 68
Isla or ISLA may refer to: Organizations * International Securities Lending Association, a trade association * International School of Los Angeles * International Bilingual School, later named International School of Los Angeles People * Isla (given name) * Víctor Isla, Peruvian politician and a Congressman representing Loreto for the 2006–2011 term * Mauricio Isla, Chilean football player * Isla Fisher, actress and author Music * ''Isla'' (Portico Quartet album), a 2009 album by Portico Quartet Places *Isla, Queensland, a locality in the Shire of Banana, Australia * Mt. Izla, location of ancient Christian monasteries, on the border between Turkey and Syria * Isla (Cantabria), a village in the Spanish region of Cantabria * River Isla, Perthshire, a tributary of the River Tay in Perthshire, Scotland; flows through Glen Isla and Strathmore * River Isla, Moray a tributary of the River Deveron in North-East Scotland; flows through Keith in Banffshire * Senglea, Isla (Senglea) ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Internal Reflection
Total internal reflection (TIR) is the optical phenomenon in which waves arriving at the interface (boundary) from one medium to another (e.g., from water to air) are not refracted into the second ("external") medium, but completely reflected back into the first ("internal") medium. It occurs when the second medium has a higher wave speed (i.e., lower refractive index) than the first, and the waves are incident at a sufficiently oblique angle on the interface. For example, the water-to-air surface in a typical fish tank, when viewed obliquely from below, reflects the underwater scene like a mirror with no loss of brightness (Fig.1). TIR occurs not only with electromagnetic waves such as light and microwaves, but also with other types of waves, including sound and water waves. If the waves are capable of forming a narrow beam (Fig.2), the reflection tends to be described in terms of "rays" rather than waves; in a medium whose properties are independent of direction, such as air, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Torpedo
A modern torpedo is an underwater ranged weapon launched above or below the water surface, self-propelled towards a target, and with an explosive warhead designed to detonate either on contact with or in proximity to the target. Historically, such a device was called an automotive, automobile, locomotive, or fish torpedo; colloquially a ''fish''. The term ''torpedo'' originally applied to a variety of devices, most of which would today be called naval mine, mines. From about 1900, ''torpedo'' has been used strictly to designate a self-propelled underwater explosive device. While the 19th-century battleship had evolved primarily with a view to engagements between armored warships with naval artillery, large-caliber guns, the invention and refinement of torpedoes from the 1860s onwards allowed small torpedo boats and other lighter surface combatant , surface vessels, submarines/submersibles, even improvised fishing boats or frogmen, and later light aircraft, to destroy large shi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bazooka
Bazooka () is the common name for a Man-portable anti-tank systems, man-portable recoilless Anti-tank warfare, anti-tank rocket launcher weapon, widely deployed by the United States Army, especially during World War II. Also referred to as the "stovepipe", the innovative bazooka was among the first generation of rocket-propelled grenade, rocket-propelled anti-tank weapons used in infantry combat. Featuring a solid-propellant rocket for propulsion, it allowed for High-explosive anti-tank warhead, high-explosive anti-tank (HEAT) warheads to be delivered against Vehicle armour, armored vehicles, machine gun nests, and fortified bunkers at ranges beyond that of a standard thrown grenade or land mine, mine. The universally applied nickname arose from the M1 variant's vague resemblance to the musical instrument called a "bazooka (instrument), bazooka" invented and popularized by 1930s American comedian Bob Burns (humorist), Bob Burns. During World War II, the Nazi Germany, German arm ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
