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Q1. Helium (He), a monatomic gas, fills a 0.009 m3 container. The pressure of the gas is 6.00 105 Pa. How long would a 0.25 hp engine have to run (1 hp = 746 W) to create an amount of energy identical to the internal energy of this gas?

Q2. A strong lightning bolt transfers about 25 c to earth. If each water molecule donates one electron to lightning, what mass of water lost an electron to lightning? One mole of water has a mass of 18g.

Q3. If a metal wire carries a current of 23.0 mA, how long does it take for 12.0×1020 electrons to pass a given cross-sectional area anywhere along the wire? The magnitude of the charge on an electron is 1.6 × 10-19 C.

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