GIVE REASON !
during interconversion of energy , the amount of energy disappearing in one form exactly reappears in another form
Answers
Answer:
Energy can be converted from one form two another. Some examples are:
Potential energy stored in a ball at a height is converted to kinetic energy when it reaches the ground after free fall.
Chemical energy stored in a fire cracker is converted into kinetic, heat, light and sound energy on bursting.
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Explanation:
Answer:
Energy and energy transformations can be easily understood through the concept of work done.
Definition : Energy can be understood as the ability of one physical system to do work on other physical systems.
Like for example Potential energy.
When you are lifting a stone from from the ground , you are doing work against gravity which eventually gets stored in the form of energy (Potential).
Electrical energy to light energy
When you are switching on the cell(power source), work is done by the battery as the electrons move from the anode to the cathode , this work done on the battery(physical system 1) manifests itself in the form of work done by the bulb*(physical system 2)
* -- Work done by the bulb is the work done by the electromagnetic radiation to travel in space.Actually Light exerts a physical pressure on objects in its path. This is explained by the particle in which photons strike and transfer their momentum. Light pressure is equal to the power of the light beam divided by the speed of light. The effect of light pressure is negligible for everyday objects. For example, you can lift a coin with laser pointers, but it would take many billions of them to do it. Light pressure can cause asteroids to spin faster by working on them like wind pushing a windmill.
What distinguishes energy at the molecular level
Different forms of energy can only be distinguished by the attributes of molecules in the matter.
The relative randomness of the molecules is one form of energy while the orientation of the atoms in a molecule is another energy.
It's not the molecules per se that determines the energy but the state, position and orientation of the molecules in the matter.