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Unformatted text preview: energy is simply lost . The remaining energy is, for the most part, changed into heat. While this doesnt help the movement of the car, it is still in fact a different usage of the energy. The law of Conservation of Energy is so important because it can be applied to so many parts of physics and all science in general. Electricity, more specifically an electrical current, is another good example. As stated in the Junction Theorem, all currents into a circuit must equal the amount of currents leaving the circuit; no electrical energy is created or destroyed . To specify a general conclusion, it is the universal applicability of the law of Conservation of Energy that makes it so important in physics and to society. References:  http://tomclegg.net/conservation  http://www.britannica.com/eb/article-9045598/Kirchhoffs-circuit-rules#95092.hook...
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