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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.
What mass of stone is necessary if the temperature is not to drop below 18.5°C overnight. Sunlight shining in during the daytime is absorbed by the floor, interior walls, and objects in the room, raising their temperature to 37.5°C.
This magnetic field accelerates the electron in a circular motion. What is radius of the circle. The final situation is observed to be all water at 18°C. What was the mass of the ice cube.
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If the velocity of the car is increased to 50 km/ hour, what is its kinetic energy. if the velocity is improved to 75 km/ hour, what is its kinetic energy.
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A 66 N m torque acts on a wheel with a moment of inertia 175 kg m2. If the wheel starts from rest, how long will it take the wheel to make one revolution? The system is released from rest and accelerates under the weight of m2.
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