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well water to ice can be reversed back to water but bread to toast cant. there is also wind to electricity, trees (wood) into paper and for sand into glass. I think they can probably all be summed up in one concept: entropy. Even for processes that appear to be reversible, the truth is that whatever energy differences exist in the 'thing', it cannot be restored after being spent without the expense of more energy. The original 'thing' can never be restored in the sense of 'no net loss of energy'.

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Q: Give four example of the changes which cannot be reversed?
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Give an example of any change with cannot be reversed?

Type your answer here... Death


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A five digit number plate can be read even if reversed. on reversing value is increased by 78633. What is the original no if all digits are different?

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