Magnetism is a property of materials that respond at an atomic or subatomic level to an applied magnetic field. Ferromagnetism is the strongest and most familiar type of magnetism. It is responsible for the behavior of permanent magnets, which produce their own persistent magnetic fields, as well as the materials that are attracted to them. However, all materials are influenced to a greater or lesser degree by the presence of a magnetic field. Some are attracted to a magnetic field (paramagnetism); others are repulsed by a magnetic field (diamagnetism); others have a much more complex relationship with an applied magnetic field (spin glass behavior and antiferromagnetism). Substances that are negligibly affected by magnetic fields are known as non-magnetic substances. They include copper, aluminium, gases, and plastic.
Stretching is a form of physical exercise in which a specific skeletal muscle (or muscle group) is deliberately elongated, often by abduction from the torso, in order to improve the muscle’s felt elasticity and reaffirm comfortable muscle tone. The result is a feeling of increased muscle control, flexibility and range of motion. Stretching is also used therapeutically to alleviate cramps.
Scuba diving (“SCUBA” originally being an acronym for self contained underwater breathing apparatus, now widely considered a word in its own right) is a form of underwater diving in which a diver uses a scuba set to breathe underwater.
An egg yolk is a part of an egg which feeds the developing embryo. The egg yolk is suspended in the egg white by one or two spiral bands of tissue called the chalazae. Prior to fertilization, the yolk together with the germinal disc is a single cell; one of the few single cells that can be seen by the naked eye.
As a food, yolks are a major source of vitamins and minerals. They contain all of the egg’s fat and cholesterol, and about one-fifth of the protein. If left intact while cooking fried eggs, the yellow yolk surrounded by a flat blob of whites creates the distinctive sunny-side up form of the food. Mixing the two components together before frying results in the pale yellow form found in omelettes and scrambled eggs.
Volleyball is an Olympic team sport in which two teams of six players are separated by a net. Each team tries to score points by grounding a ball on the other team’s court under organized rules.
Competitive teams master six basic skills: serve, pass, set, attack, block and dig. Each of these skills comprises a number of specific techniques that have been introduced over the years and are now considered standard practice in high-level volleyball.
The three standard volleyball formations are known as “4–2″, “6–2″ and “5–1″, which refers to the number of hitters and setters respectively. 4–2 is a basic formation used only in beginners’ play, while 5–1 is by far the most common formation in high-level play.
There are many variations on the basic rules of volleyball. By far the most popular of these is beach volleyball, which is played on sand with two people per team, and rivals the main sport in popularity.
The history of Olympic volleyball traces back to the 1924 Summer Olympics in Paris, where volleyball was played as part of an American sports demonstration event.
The White Stripes was an American alternative rock band, formed in 1997 in Detroit, Michigan. The group consisted of the songwriter Jack White (vocals, guitar, and keyboards) and drummer Meg White (drums and occasional vocals). Jack and Meg White were previously married to each other, but are now divorced. After releasing several singles and three albums within the Detroit music scene, the White Stripes rose to prominence in 2002, as part of the garage rock revival scene. Their successful and critically acclaimed albums White Blood Cells and Elephant drew them attention from a large variety of media outlets in the United States and the United Kingdom.
Color blindness or color vision deficiency is the inability or decreased ability to see color, or perceive color differences, under lighting conditions when color vision is not normally impaired. “Color blind” is a term of art; there is no actual blindness but there is a fault in the development of either or both sets of retinal cones that perceive color in light and transmit that information to the optic nerve. The gene that causes color blindness is carried on the X chromosome, making the handicap far more common among men (who have just one X chromosome) than among women (who have two, so must inherit the gene from both parents).
Shorts are a bifurcated garment worn by both men and women over their pelvic area, circling the waist, and covering the upper part of the legs, sometimes extending down to or even below the knee, but not covering the entire length of the leg. They are called “shorts” because they are a shortened version of trousers, which cover the entire leg. Shorts are typically worn in warm weather or in an environment where comfort and airflow are more important than the protection of the legs.
Cobblestones are stones that were frequently used in the pavement of early streets. “Cobblestone” is derived from the very old English word “cob”, which had a wide range of meanings, one of which was “rounded lump” with overtones of large size. “Cobble”, which appeared in the 15th century, simply added the diminutive suffix “le” to “cob”, and meant a small stone rounded by the flow of water; essentially, a large pebble. It was these smooth “cobbles”, gathered from stream beds, that paved the first “cobblestone” streets.
The definition of jogging as compared with running is not standard. Dr. George Sheehan, a running expert, is quoted to have said “the difference between a jogger and a runner is an entry blank”. Mike Antoniades offers a more specific definition, describing jogging as running slower than 6 mph (10 minute per mile pace, 9.7 km/h, 6.2 min/km).
Magnetism is a property of materials that respond at an atomic or subatomic level to an applied magnetic field. Ferromagnetism is the strongest and most familiar type of magnetism. It is responsible for the behavior of permanent magnets, which produce their own persistent magnetic fields, as well as the materials that are attracted to them. However, all materials are influenced to a greater or lesser degree by the presence of a magnetic field. Some are attracted to a magnetic field (paramagnetism); others are repulsed by a magnetic field (diamagnetism); others have a much more complex relationship with an applied magnetic field (spin glass behavior and antiferromagnetism). Substances that are negligibly affected by magnetic fields are known as non-magnetic substances. They include copper, aluminium, gases, and plastic.
