Based on the Law of Conservation of Energy, which of the following is true?
1. Potential energy is equal to thermal energy plus kinetic energy.
2. Kinetic energy is equal to potential energy minus temperature.
3. Energy cannot be created nor destroyed by ordinary chemical or physical means.
4. Kinetic energy is always equal to potential energy.
3. Energy cannot be created nor destroyed by ordinary chemical or physical means.
The correct answer is option 3: "Energy cannot be created nor destroyed by ordinary chemical or physical means." This is known as the Law of Conservation of Energy, which states that energy can neither be created nor destroyed in an isolated system, but it can be converted from one form to another (such as potential energy to kinetic energy).
The Law of Conservation of Energy states that energy cannot be created nor destroyed by ordinary chemical or physical means. This means that option 3 is true.
To understand this concept, let's break it down:
1. Potential energy is the energy that an object possesses due to its position or condition (such as gravitational potential energy or elastic potential energy). Thermal energy is the energy associated with the motion of particles in an object, and kinetic energy is the energy possessed by an object due to its motion. The sum of thermal energy and kinetic energy may not necessarily be equal to potential energy, so option 1 is incorrect.
2. Kinetic energy and potential energy are two different forms of energy and they are not directly related to temperature. Therefore, option 2 is incorrect.
4. Kinetic energy and potential energy are not always equal to each other. They are different types of energy that can exist simultaneously, but their values are determined by different factors. Hence, option 4 is incorrect.
Overall, the correct statement is that energy cannot be created nor destroyed by ordinary chemical or physical means, as stated in option 3.