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A battery has an unknown e.m.f, ε,and an internal resistance r = 0.40Ω. When a resistance R = 5.60Ω is connected across the terminals of the battery, the terminal potential difference across the battery is 11.2V. What is the e.m.f. of the battery?

Some theoriests say that in the inflationary period, the scale of the universe increased by a factore of 1050. Suppose your height were to increase by a factore of 1050. How tall would you be? Express your answer in light-years and compare it to the size...