Electricity is not a substance! Electricity here refers to electrical energy! It’s an energy shift! Electricity: physics noun [electricity].
Electricity (written “ēlectricus” in New Latin, meaning “like amber”) is a general term that includes many phenomena caused by the presence or movement of electrical charges. There are many easily observed phenomena, such as lightning, static electricity, etc., as well as some unfamiliar concepts, such as electromagnetic fields, electromagnetic induction, etc.
Electricity is a form of energy, including negative electricity and positive electricity. They are respectively composed of electrons and protons. They can also be composed of electrons and positrons. They are usually expressed in electrostatic units (such as electrostatic units). Electrostatic Coulombs) or electrical unitsectromagnetics (such as Coulomb), its existence can be observed from the attraction and repulsion of triboelectric objects, and it can also be observed in certain natural phenomena (such as lightning or the northern lights), and is generally used in the form of electric current.
Electricity is a natural phenomenon. Electricity is a property that creates repulsion and attraction between subatomic particles like electrons and protons. It is one of the four fundamental interactions of nature. There are two types of electricity or charge: we call one type positive electricity and the other type negative electricity. Through experiments, we discovered that objects of the same sex repel each other and objects of the opposite sex attract each other. Attraction or repulsion follows Coulomb's law.
During the use of the following natural resources, chemical changes have occurredoducts: ( ) A. Solar seawater salt B. Wind energy C. Solar heatingD. Synthesis of coal
A. No new substances are generated during the wind energy production process. It is a physical change and does not use chemical reactions to obtain electrical energy.
B. No new substances are generated during the hydroelectricity production process. It is a physical change and does not use chemical reactions to obtain electrical energy.
C. Thermal power generation uses the heat released from burning coal, which is a chemical change. It converts chemical energy into electrical energy and uses the energy generated by chemical reactions.
D. No new substances are generated in the solar energy production process. It is a physical change and does not use chemical reactions to obtain electrical energy.e.
Then choose C.
In the process of developing and using the following energy sources, the main chemical changes that have occurred are ( ) A. Using wind energy to produce electricity B. Use fluorescent lamps for lighting C. Using the sun
A and drying sea water salt is just a process of evaporation and water separation. No new substance is generated, which is a physical change, so A is false;
B. . Wind energy is only generated by wind energy. When the wheel turns to produce energy, no new matter is generated, which is a physical change, so B is false;
C. thermal energy through irradiation from the sun. No new matter is generated, which is a physical change. Therefore, C is false;
D. Global use of coal produces new substances such as goudcoal, coke. furnace gas and coke, which are chemical changes, so D is correct.
Then choose D.
A. No new substances are generated during the wind power production process, which constitutes a physical change.
B, No new substances are generated during the process of lighting with fluorescent lamps, which constitutes a physical change.
C. During the process of heating water with solar energy, no new substances are generated, which constitutes a physical change.
D. New substances are generated when cooking and heating with natural gas, which constitutes a chemical change.
Then choose D.