Which Of The Following Statements Correctly Describes The Law Of Conservation Of Energy?

Which Of The Following Statements Correctly Describes The Law Of Conservation Of Energy
Which statement describes the law of conservation of energy? Energy cannot be created nor destroyed, but it changes from one form to another.

Which of the following correctly describes the law of conservation energy?

The law of conservation of energy states that energy can neither be created nor destroyed – only converted from one form of energy to another. This means that a system always has the same amount of energy, unless it’s added from the outside. This is particularly confusing in the case of non-conservative forces, where energy is converted from mechanical energy into thermal energy, but the overall energy does remain the same.

is the total internal energy of a system, is the initial internal energy of a system. is the work done by or on the system. is the heat added to, or removed from, the system.

It is also possible to determine the change in internal energy of the system using the equation: This is also a statement of the first law of thermodynamics, While these equations are extremely powerful, they can make it hard to see the power of the statement.

The takeaway message is that energy cannot be created from nothing. Society has to get energy from somewhere, although there are many sneaky places to get it from (some sources are primary fuels and some sources are primary energy flows ). Early in the 20 th century, Einstein figured out that even mass is a form of energy (this is called mass-energy equivalence ).

The amount of mass directly relates to the amount of energy, as determined by the most famous formula in physics:

is the amount of energy in an object or system. is the mass of the object or system. is the speed of light, roughly,

Which of the following correctly describes the law of conservation of matter?

Exercise \(\PageIndex \) –

  1. What is the law of conservation of matter?
  2. How does the law of conservation of matter apply to chemistry?
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Answer a: The law of conservation of matter states that in any given system that is closed to the transfer of matter, the amount of matter in the system stays constant Answer b: The law of conservation of matter says that in chemical reactions, the total mass of the products must equal the total mass of the reactants.

Which among the following statement shows law of conservation of energy?

Answer: The true statement about the law of conservation of energy is energy can neither be created nor be destroyed and energy can be transformed from one form to another. Explanation: The law of conservation of energy states that “the total energy of an isolated system remains conserved”.

  1. This law means that energy can neither be created nor be destroyed rather it can only be transformed from one form to another,
  2. For example, chemical energy is converted to kinetic energy when a particle is exploded.
  3. If we add up all forms of energy that were released in the explosion such as kinetic energy of the explodes, as well as heat and sound, one will get the exact decrease of chemical energy in the combustion of the particle.

The true statement about the law of conservation of energy is energy can neither be created nor be destroyed and energy can be transformed from one form to another. Hence, both statements are true.

What does the law of conservation of energy say quizlet?

The law of conservation of energy says that energy is neither created nor destroyed. When we use energy, it doesn’t disappear. We change it from one form of energy into another.

What is the law of conservation of energy short answer?

Law of Conservation of Energy – Principle Of Conservation Of Energy, Derivation, Energy conservation, Examples, and FAQs The law of conservation of energy states that energy can neither be created nor be destroyed. Although, it may be transformed from one form to another.

  • If you take all forms of energy into account, the total energy of an isolated system always remains constant.
  • All the follow the law of conservation of energy.
  • In brief, the law of conservation of energy states that In a closed system, i.e., a system that is isolated from its surroundings, the total energy of the system is conserved.
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Example of Energy Transformation So in an isolated system such as the universe, if there is a loss of energy in some part of it, there must be a gain of an equal amount of energy in some other part of the universe. Although this principle cannot be proved, there is no known example of a violation of the principle of conservation of energy.

  • Consider a point A, which is at height ‘H’ from the ground on the tree, the velocity of the fruit is zero hence potential energy is maximum there.
  • E = mgH ———- (1)
  • When the fruit falls, its potential energy decreases, and kinetic energy increases.

At point B, which is near the bottom of the tree, the fruit is falling freely under gravity and is at a height X from the ground, and it has speed as it reaches point B. So, at this point, it will have both kinetic and potential energy. E = K.E + P.E

  1. P.E = mgX ——— (2)
  2. According to the third equation of motion,
  3. K.E=mg(H-X)——– (3)
  4. Using (1), (2) and (3)
  5. E = mg(H – X) + mgX
  6. E = mg(H – X + X)
  7. E = mgH

Similarly, if we see the energy at point C, which is at the bottom of the tree, it will come out to be mgH. We can see as the fruit is falling to the bottom, here, potential energy is getting converted into kinetic energy. So there must be a point where kinetic energy becomes equal to potential energy.

  • As the body is at height X from the ground,
  • P.E = mgX ——— (5)
  • Using (4) and (5) we get,
  • H/2 is referred to as the new height.
  • Read more:
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What is the law of conservation of energy question answer?

According to the law of conservation of energy, energy cannot be created or destroyed. It can, however, be transformed from one form to another. When all forms of energy are considered, the total energy of an isolated system remains constant.

Which statement best summarizes the law of conservation of energy quizlet?

Which statement best summarizes the law of conservation of energy? Energy changes forms and is neither created nor destroyed.

Which of the following statements best defines the law of conservation of mass quizlet?

Which best describes the law of conservation of mass? The mass of the reactants and products is equal and is not dependent on the physical state of the substances.

Which of the following is a statement of the law of conservation of mass quizlet?

The law of conservation of mass states that mass in an isolated system is neither created nor destroyed by chemical reactions or physical transformations.

What is the law of conservation of matter quizlet?

Law of Conservation of Matter. States that, during a chemical reaction, matter cannot be created or destroyed. Even though the matter may change from one form to another, the same number of atoms exists before and after the changes take place.

What is the Law of Conservation of Matter quizlet?

Law of Conservation of Matter. States that, during a chemical reaction, matter cannot be created or destroyed. Even though the matter may change from one form to another, the same number of atoms exists before and after the changes take place.