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Why does the amount of useful energy decrease as energy changes form?
Wiki User
∙ 13y ago
In any practical machine there is always some loss of energy in its operation, such as losses from an internal combustion engine, or friction in a gearbox, so you never get as much useful output as a straight equivalence of energy would suggest.
Wiki User
∙ 13y ago
Wiki User
∙ 11y agoUsable energy decreases every time energy is converted because the energy is not converted 100% efficiently. Light, heat and sound released from the conversion are some factors that can contribute to reduction of energy. For example, when you kick a football, you create heat and sound on the impact between foot and ball which causes kinetic energy the ball possesses to be less than the force used to kick the ball.
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The amount of energy in a chemical that can do useful work is called?
This would be its chemical potential energy, of course it depends on what other chemical(s) it is reacting with, such as oxygen.
If electrical energy goes into a light bulb what useful energy comes out?
The useful energy that comes out is light energy. Heat energy is also produced but is not useful
What is the definition of energy transformations?
2. Energy can change from one form to another. This is called an energy conversion or energy transformation. • The Law of Conservation of Energy states that energy can change form, but it cannot be created or destroyed. Therefore, the total amount of energy stays the same. • In energy transformations, some energy is always lost to the environment as thermal energy. Examples of energy transformations and their uses: · A television changes electrical energy into sound and light energy. · A toaster changes electrical energy into thermal energy and light. · A car changes chemical energy from fuel into thermal energy and mechanical energy. · A flashlight changes chemical energy from batteries into light energy. · Solar energy is converted into electrical energy using solar panels. · Campfires convert chemical energy stored in wood into thermal energy, which is useful for cooking food and staying warm.
What is a 2nd law of energy?
You must be referring to the two Laws of Thermodynamics. Stated in terms of energy: 1. The First Law of Thermodynamics is the Law of Conservation of Energy, meaning that energy can not be created or destroyed. 2. However, useful energy is continuously being converted into unusable energy. This is irreversible. This is the Second Law of Thermodynamics.
The laws of thermodynamics state that whenever energy?
In any process energy is conserved, i.e. it is neither created nor destroyed; it just changes form. In any process some energy will be lost as heat; you can't convert all energy from a source into useful work.
Why does the amount of useful energy decrease when energy changes from one form to another?
Conversions of energy forms are lossy. For example, when mechanical energy is converted to electrical energy (such as happens in an electric generator), there is friction which leads to the escape of heat and sound energy. While the total amount of energy in all forms remains constant, the heat and sound energy are next to impossible to recapture, so this is considered a loss of useful energy.
An airplane changes energy into different forms The total amount of energy does not?
The total amount of energy doesn't change. However, some useful energy will be converted into unusable energy.The total amount of energy doesn't change. However, some useful energy will be converted into unusable energy.The total amount of energy doesn't change. However, some useful energy will be converted into unusable energy.The total amount of energy doesn't change. However, some useful energy will be converted into unusable energy.
A comparison of amount of energy before a conversion with the amount of useful energy after a conversion?
Usually, the amount of useful energy after a conversion will be less than the original energy. In no case can it be more.Usually, the amount of useful energy after a conversion will be less than the original energy. In no case can it be more.Usually, the amount of useful energy after a conversion will be less than the original energy. In no case can it be more.Usually, the amount of useful energy after a conversion will be less than the original energy. In no case can it be more.
Does total energy increase when one form of energy is converted to another form?
No, it won't increase nor decrease. Energy can't be created or destroyed (First Law of Thermodynamics). On the other hand, the amount of USEFUL energy will usually decrease in energy transformations (Second Law of Thermodynamics).
During an energy transfer what happens to the total amount of energy?
Energy can not be destroyed, so the total amount of energy before a change is equal to the amount of energy after the change. However, some energy is changed into a useful form, but some may be wasted and not used. For example, a light bulb, changes electrical energy into light energy, but some of the energy is changed to heat and some to sound, these are not useful and are wasted, but are changed nonetheless. So a transformation from mechanical energy to heat will have the same total energy at the start as at the finish, but unless it is 100% efficient some of the original energy will be 'lost'
What is a useful amount of energy you get from a system?
It is energy officenty
What is a comparison of the amount of energy before conversion with the amount of useful energy after conversion?
Energy Efficiency
Why is the conservation of energy an issue that people must deal with if the first law of thermodynamics states energy is not created or destroyed?
Because the second law of thermodynamics states that any use of energy always results in a decrease in the amount of "useful" energy.
What is the name of energy amount of useful energy you get from a system?
That may refer to the system's efficiency (which is formally the amount of useful output power divided by the amount of input power).
What is the name of the amount of useful energy you get from a system?
That may refer to the system's efficiency (which is formally the amount of useful output power divided by the amount of input power).
What is an activation energy diagram in chemistry?
Activation energy in chemistry is the amount of energy required to start a reaction. For every chemical reaction, a certain amount of energy is required to start it. The diagram represents how much energy it takes to do this, and also shows how much energy you get from it. With this diagram, you can also calculate the energy of products, reactants, e.t.c. This is also a useful diagram to explain the function of a catalyst, something used to decrease the activation energy.
The amount of power derived from a device or system is its?
That amount is always less than the energy you put into the system. Divide the amount of useful energy you get from a system by the amount of energy you put into it, and you find the system's 'efficiency'.
