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Introduction Solar power is power we get from the sun. Unlike fossil fuels, which can cause significant pollution and emit greenhouse gases when...

In ancient Egypt, the temple priests had to perform religious rituals at certain times of the day, so accurate timekeeping...

Introduction An infinity mirror creates an optical illusion of an infinitely long tunnel. It actually consists of two mirrors — a regular mirror and a one-way...

Motors that use direct current (DC) voltage are found in many familiar items, such as electric shavers, battery-powered drills, and the fans in...