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Energy is a fundamental concept in physics and refers to the ability of a system to do work. It is a scalar physical quantity that can be defined as the capacity of a system to perform work. Work is defined as the transfer of energy from one object or system to another, resulting in a change in the energy of the recipient object or system.
Energy can exist in many forms, including kinetic energy, potential energy, thermal energy, electromagnetic radiation, and chemical energy. Kinetic energy is the energy an object possesses due to its motion, while potential energy is the energy stored in an object due to its position or configuration. Thermal energy is the energy that is associated with the random motion of atoms and molecules within a substance. Electromagnetic radiation is a type of energy that is carried by electromagnetic waves, such as light. Chemical energy is the energy that is stored in chemical bonds between atoms and molecules.
Energy can neither be created nor destroyed, but it can be transformed from one form to another. The first law of thermodynamics, also known as the law of conservation of energy, states that the total energy in a closed system remains constant, although it can be converted from one form to another.
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III. Match a question in column A with its answer in column B.
A B 1. How heavy is Mai? a. I like cartoons. 2. What kinds of TV programs do you like? b. Because I got up late. 3. Why did you come to class late? c. He should go to the movie theater. 4. Where should Nam go to relax? d. She is forty kilos. 88999 -
36254
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23088
