Answer:
1. When you rub your hands together, the action of scraping the surface of your skin back and forth against each other causes the molecules in your skin to move a little faster. The faster that molecules move, the higher the temperature. So the friction of rubbing your hands together makes them feel warmer.
2. : a lamp in which electricity is the source of light — compare arc lamp, fluorescent lamp, incandescent lamp, neon lamp, nernst lamp.
3. a rice cooking system for large-scale productions, automating main processes, including stocking, washing, cooking, and placing of rice. Only a few operators are needed to use the machine. It needs less work from workers as there is no need to lift the lid of the kettle that contains rice.
4. A natural gas stove releases of a mixture of gases, mostly methane. That click you hear when you turn on the burner is the continuous discharge of a piezoelectric crystal, which is basically constant sparks of electric charge emitted into the air. A nice flame erupts in less than a second and you are ready to cook.
5.
When wood is burned, oxygen and other elements in the air (mainly carbon, hydrogen and oxygen) react to form carbon dioxide that is released into the atmosphere, while the minerals turn into ashes. ... Thus the carbon is left to turn into charcoal.
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