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Snowball
A snowball is a spherical object made from snow, usually created by scooping snow with the hands, and pressing the snow together to compact it into a ball. Snowballs are often used in games such as snowball fights. A snowball may also be a large ball of snow formed by rolling a smaller snowball on a snow-covered surface. The smaller snowball grows by picking up additional snow as it rolls. The terms "snowball effect" and "snowballing" are derived from this process. The Welsh dance " Y Gasseg Eira" also takes its name from an analogy with rolling a large snowball. This method of forming a large snowball is often used to create the sections needed to build a snowman. The underlying physical process that makes snowballs possible is sintering, in which a solid mass is compacted while near the melting point. Scientific theories about snowball formation began with a lecture by Michael Faraday in 1842, examining the attractive forces between ice particles. An influential early explanat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Snowball Fight
A snowball fight is a physical game in which balls of snow are thrown with the intention of hitting somebody else. The game is similar to dodgeball in its major factors, though typically less organized. This activity is primarily played during winter when there is sufficient snowfall. Two examples of organized games involving snowball fights are Yukigassen and SheenAab Jung. Yukigassen (雪合戦) is a snowball fighting-competition from Japan. SheenAab Jung (aka 'Snow Fighting') is played in Jammu and Kashmir of India. History Legal prohibition In 1472, the city council of Amsterdam allegedly prohibited snowball fights for reasons of public safety, a prohibition which occasionally finds its way into lists of strange laws. The law, if it ever existed, is not presently enforced. Several localities have passed ordinances prohibiting snowball fights, typically as part of a larger prohibition on thrown missiles. In 2018, the town council of Severance, Colorado unanimously o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Snow Roller
A snow roller is a rare meteorological phenomenon in which cylindrical snowballs are formed naturally as chunks of snow roll down hill or are blown along the ground by wind, picking up further snow along the way, in much the same way that the large snowballs used in snowmen are made. They can be as small as a tennis ball, but they can also be bigger than a car. Most snow rollers are a few inches or centimeters wide. Alternative names for snow rollers include: snow bales, snow donuts, snownuts and wind snowballs. Unlike snowballs made by people, snow rollers are typically cylindrical in shape, and are often hollow since the inner layers, which are the first layers to form, are weak and thin compared to the outer layers. The inner sections can easily be blown away, leaving what looks like a doughnut or Swiss roll. Several conditions are needed for snow rollers to form: * There must be a relatively thin surface layer of wet, loose snow, with a temperature near the melting point ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Snowball Effect
A snowball effect is a process that starts from an initial state of small significance and builds upon itself, becoming larger (graver, more serious), and also perhaps potentially dangerous or disastrous (a vicious circle), though it might be beneficial instead (a virtuous circle). This is a cliché in cartoons and modern theatrics and it is also used in psychology. The common analogy is with the rolling of a snowball down a snow-covered hillside. As it rolls the ball will pick up more snow, gaining more mass and surface area, and picking up even more snow and momentum as it rolls along. In aerospace engineering Aerospace engineering is the primary field of engineering concerned with the development of aircraft and spacecraft. It has two major and overlapping branches: aeronautical engineering and astronautical engineering. Avionics engineering is s ..., it is used to describe the multiplication effect in an original weight saving. A reduction in the weight of the fu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Snowman
A snowman is an anthropomorphic snow sculpture of a man often built in regions with sufficient snowfall and is a common winter tradition. In many places, typical snowmen consist of three large snowballs of different sizes with some additional accoutrements for facial and other features. Due to the sculptability of snow, there is also a wide variety of other styles. Common accessories include branches for arms and a smiley face made of stones, with a carrot used for a nose. Clothing, such as a hat or scarf, may be included. The low cost and common availability of materials mean snowmen are usually abandoned once completed. Construction Snow becomes most suitable for packing when it approaches its melting point and becomes moist and compact. Making a snowman of powdered snow is difficult since it will not stick to itself, and if the temperature of packing snow drops, it will form an unusable denser form of powdered snow called the crust. Thus, a good time to build a snowman m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ball Ice
Ice eggs, or ice balls, are a rare phenomenon caused by a process in which small pieces of sea ice in open water are rolled over by wind and currents in freezing conditions and grow into spheroid pieces of ice. They may collect into heaps of balls or 'eggs' on beaches. The gentle churn of water, blown by a suitably stiff breeze makes concentric layers of ice form on a seed particle that then grows into the floating ball as it rolls through the freezing currents. Given enough time, the frozen balls can grow to become boulder size. In 2016, giant snowballs washed up on a beach in Siberia, some measuring a metre (about 3 feet) across. An ice specialist from the Finnish Meteorological Institute has been quoted as saying ice balls are rare but not unprecedented, and occur about once a year on the Finnish coastline as conditions allow. They also appear on the American Great Lakes where they are called Ice balls. See also * Yukimarimo - Wind blown balls of fine frost accum ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The Snowball (children's Novel)
''The Snowball'' (first published 1969) is a domestic fantasy novel for children by the English writer Barbara Sleigh (1906–1982), who is best known for her Carbonel series. The two main human characters are Tom Tickle, aged eight, and his sister Tilda, aged six. The story The story is set in a small house on the edge of a small English country town. The children are on a loose rein, as their mother is soon called away to nurse some relations of theirs through a bout of measles, leaving them with their preoccupied father, a schoolmaster who is busy writing a book (p. 10). Snow starts to fall almost immediately after Mrs Tickle leaves. The children spend the day making a snowman – Tom's work – and a snow-woman – Tilda's work with a little help from Tom (p. 17 ff.) The following day, the children are puzzled to find a large, smooth snowball between the snowman and snow-woman. They decide to store it in the fridge to show to their mother when she returns. But it is "no ordi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sintering
Clinker nodules produced by sintering Sintering or frittage is the process of compacting and forming a solid mass of material by pressure or heat without melting it to the point of liquefaction. Sintering happens as part of a manufacturing process used with metals, ceramics, plastics, and other materials. The atoms in the materials diffuse across the boundaries of the particles, fusing the particles together and creating one solid piece. Because the sintering temperature does not have to reach the melting point of the material, sintering is often chosen as the shaping process for materials with extremely high melting points such as tungsten and molybdenum. The study of sintering in metallurgical powder-related processes is known as powder metallurgy. An example of sintering can be observed when ice cubes in a glass of water adhere to each other, which is driven by the temperature difference between the water and the ice. Examples of pressure-driven sintering are the compact ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Barbara Sleigh
Barbara Grace de Riemer Sleigh (1906–1982) was an English children's writer and broadcaster. She is remembered most for her Carbonel series about a king of cats. Family and career Barbara Sleigh was born on 9 January 1906 in Birmingham, the daughter of an artist, Bernard Sleigh, and his wife Stella, née Phillp, who had married in 1901. Both parents came from a Methodist background, but she was brought up an Anglican. The family moved to Chesham for a time, then back to Birmingham. Their marriage broke up in about 1914. Her older brother, Brocas Linwood Sleigh (1902–1965), would also become a writer. Having attended art college and teachers' training college, Sleigh taught in various schools before joining the teacher training department at Goldsmiths College in London in 1929. She went to work for the BBC programme ''Children's Hour'' in 1932. There, in 1935, she married a colleague, David Davis (1908–1996) at Dunchurch, Warwickshire, but BBC house rules at the time w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wave Action
In fluid dynamics, a wind wave, water wave, or wind-generated water wave, is a surface wave that occurs on the free surface of bodies of water as a result from the wind blowing over the water surface. The contact distance in the direction of the wind is known as the '' fetch''. Waves in the oceans can travel thousands of kilometers before reaching land. Wind waves on Earth range in size from small ripples, to waves over high, being limited by wind speed, duration, fetch, and water depth. When directly generated and affected by local wind, a wind wave system is called a wind sea. Wind waves will travel in a great circle route after being generated – curving slightly left in the southern hemisphere and slightly right in the northern hemisphere. After moving out of the area of fetch, wind waves are called '' swells'' and can travel thousands of kilometers. A noteworthy example of this is waves generated south of Tasmania during heavy winds that will travel across th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ambrogio Lorenzetti 010
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Ambrogio is a given name, and may refer to: *Saint Ambrogio (Ambrose), patron saint of Milan * Ambrogio Lorenzetti ( – 1348), painter *Ambrogio Damiano Achille Ratti, the birth name of Pope Pius XI * Ambrogio Bergognone, Renaissance painter * Ambrogio Spinola, 1st Marquis of the Balbases, general *Ambrogio Morelli, bicycle racer *Ambrogio Foppa, goldsmith *Ambrogio Calepino, lexicographer *Ambrogio Besozzi, Baroque painter *Ambrogio Casati, modern painter *Ambrogio Fogar, rally driver *Ambrogio Levati, gymnast *Ambrogio Minoja, classical composer *Ambrogio Frangiolli, architect See also * Ambrogio is also a British brand of robotic lawn mower * Sant'Ambrogio (other) Sant'Ambrogio may refer to the following entities in Italy: * Basilica of Sant'Ambrogio, a church in the Milan * Sant'Ambrogio, Florence, a Roman Catholic church in Florence * Sant'Ambrogio di Torino, a municipality in the Turin * Sant'Ambrogio di ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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