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I assume you mean the law of conservation of energy, the First Law of Thermodynamics.
This has been confirmed by countless experiments; no exceptions have been found.
Also, countless enthusiasts have tried to build devices to violate this law; needless to say, so far they failed. Don't be one of them, wasting years of your time on something that will never work. (Search for the "Museum of Unworkable Devices", for details on this fruitless search.)
The "why" is really the tricky part; nowadays, the law of conservation of energy is usually stated to be a consequence of Noether's Theorem. Her law has several aspects; but in the case of conservation of energy, this is related to the fact that physical laws don't change over time. If the conservation of energy isn't valid, then the physical laws of our Universe would change over time! However, this statement involves some advanced math. Search for Noether's Theorem for more details.
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Is mechanical energy always conserved why or why not?
no it's not cuz if there is friction energy wont be conserved
In a collision what is conserved?
Momentum is conserved in a collision. If two cars have the same mass and are traveling at the same speed and collide headfirst, the momentum of both cars cancel each other out and they will be motionless. If one has greater speed or mass than the other, it will still have the difference in momentum after the collision.
Which energy is always conserved?
kinetic energy..........
Which is not conserved mass acceleration energy momentum?
Acceleration is not conserved. Energy can not be created nor destroyed. Mass and momentum are both conserved through a set time.
How does energy is conserved in a transfermation of energy?
Energy is neither used up nor destroyed, but it is converted into something else. In that way, it is conserved.
Is machanical energy always conserved?
No. Total energy is always conserved, but not so mechanical energy.
Mechanical energy always conserved why or why not?
no it's not cuz if there is friction energy wont be conserved
Is mechanical energy always conserved why or why not?
no it's not cuz if there is friction energy wont be conserved
In a collision what is conserved?
Momentum is conserved in a collision. If two cars have the same mass and are traveling at the same speed and collide headfirst, the momentum of both cars cancel each other out and they will be motionless. If one has greater speed or mass than the other, it will still have the difference in momentum after the collision.
The total amount of energy before and after a chemical reaction is the same .Thus energy is what?
Therefore energy is conserved.
Is rock conserved in the same sense that energy is conserved?
Not really, no.
Which energy is always conserved?
kinetic energy..........
Which is not conserved mass acceleration energy momentum?
Acceleration is not conserved. Energy can not be created nor destroyed. Mass and momentum are both conserved through a set time.
How does energy is conserved in a transfermation of energy?
Energy is neither used up nor destroyed, but it is converted into something else. In that way, it is conserved.
How can tidal energy be conserved?
Tidal Energy can be conserved by using offshore turbines rather than underwater turbines.
How can energy be conserved from a nuclear weapon?
A tiny bit of the mass of each fissioned (or fused) atom is converted to energy. Energy is not conserver... Mass-Energy is conserved.
Is potential energy conserved or not measurable?
It is not conserved. Total energy is conserved, but specific types of energy are usually not conserved. Not sure what you mean by "measurable" - potential energy is usually calculated, on the basis of other quantities. For example, in the case of gravitational potential energy, PE = mgh (mass x gravity x height), all of which can be measured.
