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1: A transformer has 100 loops in its secondary winding and is designed to accept an input AC potential difference of 830 V and produce an output of 470 V. How many loops does the transformer's primary winding contain?

2. What is the binding energy for a nucleus of helium-4, also known as an alpha particle? A neutron has a mass of 1.00866 u, a proton has a mass of 1.00728 u, and an alpha particle has a mass of 4.00153 u, where u = 1.66054 x 10^-27 kg. Express the energy in joules to three significant figures.

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