Electricity was at first used primarily for lighting and gradually found more broadly-based applications as a power source. By 1896, the number of electricity companies established throughout the nation reached a total of 33, and the number of electric lights with a power supply increased to 120,000.
Happiness: According to Aristotle, happiness is the only end or good that we desire for its own sake, and it is for the sake of happiness that we desire all other ends or goods.appiness, as the ethical end, does not simply consist in moral virtue, however, but includes intellectual virtue as well, and complete happiness is a contemplative as well as a practical activity. Yet, Aristotle does not exclude all of the common-sense notions of happiness.
In philosophy, happiness is translated from the Greek concept of eudaimonia, and refers to the good life, or flourishing, as opposed to an emotion. In psychology, happiness is a mental or emotional state of well-being which can be defined by, among others, positive or pleasant emotions ranging from contentment to intense joy. Happy mental states may reflect judgements by a person about their overall well-being. Since the 1960s, happiness research has been conducted in a wide variety of scientifi