Answer:
2. B. energy
3. D.kinetic energy
4. C. chemical
5. A.68.1 percent
6. A.chemical energy into thermal energy
7. D.mechanical energy
Explanation:
2. Energy is the ability of matter to produce work in the form of movement, light, heat, etc.
3. The kinetic energy of a body is that energy it possesses due to its movement.
4 .Chemical energy is the energy stored in the bonds of chemical compounds (atoms and molecules).
5. Efficiency can be calculated as (128J/188J)*100= 68%
6. Chemical energy is defined in item 4 and thermal energy is a type of energy that bodies possess when exposed to the effect of heat. It is precisely what produces that the atoms that make up the molecules are in constant motion either moving or vibrating.
7. Mechanical energy is the energy that bodies present because of their movement (kinetic energy), and their situation with respect to another body, usually the earth.
