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"The purpose of producing energy is to meet three types of societal needs: - Mechanical work (electrical equipment, for example) - Heating supply - Heat removal (cooling systems) Energy does not disappear, it merely changes form. Different forms of energy have different qualities and degrees of usefulness "

The purpose of producing energy is to meet three types of societal needs: - Mechanical work (electrical equipment, for example) - Heating supply - Heat removal (cooling systems) Energy does not disappear, it merely changes form. Different forms of energy have different qualities and degrees of usefulness

"In today's schools, most research is completed online, and Google is a great resource for combing the web. But at the same time, it's not always easy to find exactly what you want, given that there are usually millions of results - with varying degrees of accuracy. These tricks can help you find the best results, while saving time and making your life easier."

Excellent look at the ipad and levels of use.