What is a belt or long lines this is Science?
819073
Hi. Usually a streak of color or brightness on a planet like Jupiter. Caused by striations in the clouds.
609714
Take a compass and a bar magnet and let them trace the field lines. Or better yet, take a piece of paper with metal shaving on it, then place a magnet underneath. The shaving will align with the field lines. Pretty cool.
429250
I think it is something that placed in a way that from \nright to left (flat way) or so but not from up to down or down to up.\nexample: ------------------------- horizontal line
1116088
You need to know the length of a line if you want to know the amount that it departs or its longitude. \n\nIf you want to know where on the globe that is... its someplace between seattle, washington and portland, oregon
88305
Boundaries that are created as a result of long-term processes.
340684
The cholera belt was an article of clothing commonly worn as a preventative measure by British soldiers serving in India, where cholera was endemic. Basically a waistband or cummerbund made of flannel or silk, the belt was supposed to keep away the cold and damp, the theory being that a chilled abdomen would lead to cholera, dysentery, diarrhea, and other gastrointestinal ailments. Doctors realized fairly early on that cholera had little to do with cold and damp and was in fact caused by fecal bacteria in drinking water. But military inertia being what it was, use of the belt persisted until after World War II.
333648
Linea nigra - brown line\nLinea alba   - white line
232527
The magnetic lines of force are produced by electrons orbiting in atoms. in a magnetized material they are coherent so that their field is additive. The lines of force produced by a single electron are like the wake produced by a boat moving through water. if this wake encounters another boat sitting in the water it will push that boat and the wake it produces will oppose the wake of the first boat. the wake has vectors, directly in front of the electron the line or wake is perpendicular to the path of the electron and oriented away from it. To the sides of the electron the line is parallel. To the rear it is perpendicular and oriented towards the electron. this angle is the polarity of the line. in a magnetic material the lines of force of all the electrons combine and produce a magnetic field. where this field is perpendicular and oriented away from the material is one pole and where it is perpendicular and oriented towards the material is the other pole. The effect of these wakes if they are opposite is to draw the materials towards one another. if they are alike they will push the materials away from one another.
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It's something that's done in the lab with traditional equipment like beakers, Erlenmeyer flasks, etc.  This generally distinguishes if from industrial scale, which is typically much larger.  It may also distinguish from micro-scale or "in situ" (where it happens) studies.
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fraction line, quotient line, ratio line
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Early fishing lines were often constructed from horse hair or silk thread, with catgut leaders. From the 1850s, modern industrial machinery was employed to fashion fishing lines in quantity. Most of these lines were made from linen, silk, and more rarely cotton or flax, sometimes with a waterproofing compound added during manufacture. Lines were either of braided or twisted construction, and early anglers often employed leaders of silkgut between the line and lure or bait in order to disguise the large diameter of their main fishing line. Modern fishing lines intended for spinning, spin cast, or bait casting reels are almost entirely made from artificial substances, including nylon, polyethylene, Dacron and Dyneema (UHMWPE). The most common type is monofilament, made of a single strand. Recently, other alternatives to standard nylon monofilament lines have been introduced made of copolymers or fluorocarbon, or a combination of the two materials. Flurocarbon in particular is well regarded for its refractive index, which is similar to that of water and as a result less visible to fish. There are also braided, cofilament and thermally fused lines, also known as 'superlines' for their small diameter, lack of stretch, and great strength relative to standard nylon monofilament lines. Both braided and thermally fused 'superlines' are now readily available.
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From the 7 meter line\n\n(7 jards 2 feet)
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contour line is  a curve connecting points where the function has a same particular value ..\n\ncontour interval is any space between vertical lines on a topographic map or globe, representing a difference in elevation between the lines. Small contour intervals are used for flat areas; larger intervals are used for mountainous terrain.
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An electromagnet is an iron core with wire wrapped around it so that the magnetic field that forms at a right angle to the direction of current becomes intensified in a specific location.  The reason for using insulated wire in an electromagnetic device is that it is not the current (electron frequency) moving through the wire that the engineer is interested in, but the automatic magnetic field that forms outside the wire.  This field is able to be formed, collapsed and reversed whenever one wishes to do so.\n\nA gravitational field (as our planet for example) is always one directional and the direction of energy flow is toward the core point of our planet.  Below the Moho line mass has its gravitational waves all focused toward the core point.  This means that all gravitational waves below that line pass through the very center of our planet and attract all mass directly on the opposite side, and at the same time also attracts all the heat energy of our planet to the core point.  If this were not true, then our planet would have (nearly) the same temperature throughout.
864756
An iron box. The magnetic field lines are trapped in the iron and the inside is shielded  of magnetism.\n\nTh
784402
In camping, a 'guy rope' is used to peg down the tent so I suppose a guy line would be the same.\n\nguy1 (gī) \nn.\nA rope, cord, or cable used to steady, guide, or secure something.
358443
Natural magnetic variations and decay.  It is like waves of variation.