Dates is a palm tree (Arecaceae) in the genus Phoenix, the fruit can be eaten. Magnet is an object that has a magnetic field. Wind is the flow of air in large quantities due to the rotation of the earth and also because of the difference in air pressure in the vicinity. Who will win?
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| Dates |
Dates have been a staple food in the Middle East for thousands of years. Dates tree believed to have originated around the Persian Gulf and has been cultivated since ancient times from Mesopotamia to prehistoric Egypt, possibly as early as 4000 BC. Ancient Egyptians used the fruit to be made into wine dates and eat at harvest. There is archaeological evidence of cultivation of dates in the Arab eastern part of the year 6000 BC. (Alvarez-Mon 2006).
In the next era, Arabs disseminating dates around South and Southwest Asia, northern Africa, Spain and Italy. Dates were introduced in Mexico and California, around Mission San Ignacio, by the Spanish in 1765.
Dates have a high tannin content and is medically used as detergent (having cleansing power) and astringent in intestinal problems. Dates can be administered for sore throat, colds, bronchial catarrh, relieve fever and a number of other complaints in the form of infusions, herbs, syrup or paste. One traditional belief says that the dates may counteract alcohol intoxication. Seed powder is also used in some traditional medicines.
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| Magnet |
At this time, a magnet is a material that has a magnetic field. The material can be in the form of permanent magnets or magnets are not fixed. Magnets that now is almost entirely artificial magnet.
Magnets always have two poles, namely: the North Pole (north / N) and south pole (south / S). Although the magnet was cut into pieces, the pieces will remain small magnets have two poles.
Magnets can attract other objects. Several things attracted even stronger than the other, the metal material. But not all metals have the same attraction to magnets. Iron and steel are two examples of material that has a high attraction by magnets. While the liquid oxygen are examples of materials that have a low attraction by magnets.
Electromagnets made from a coil of wire that acts as a magnet when an electric current through it but stop being a magnet when electric current is not given. Often, the coil wrapped around a core of "soft" ferromagnetic materials such as steel, which greatly increased the magnetic field generated by the coil. The overall strength of a magnet is measured with the magnetic moment or, on the contrary, the total magnetic flux is generated. Local strength magnet in a material is measured by its magnetization.
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| Wind |
When heated, the air expands. The air that swelled into a lighter so it rises. When this happens, the air pressure drops because they air is reduced. Cold air in the vicinity flowing into the low pressure earlier. Air shrunk to heavier and fall to the ground. Above ground the air becomes hot again and go back up. The flow of hot air rising and falling of cold air is dinamanakan convection.
Factors occurrence of wind, namely:
- Gradients barometris, the number that indicates the air pressure difference of 2 isobars a distance of 111 km. The greater the gradient barometrisnya, the faster the wind.
- The layout of the place, the wind speed near the equator faster than distant from the equator.
- High point, ie the higher places, louder anyway the wind is blowing, it is caused by the influence of friction forces that inhibit air flow. On the surface of the earth, mountains, trees, and other uneven topography provides great friction force. The higher the place, the friction force is getting smaller.
- The time, ie during the day the wind is moving faster than at night