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Q1. A 8.00 cm diameter wire coil is iniA 6.70cm diameter wire coil is initially oriented so that its plane is perpendicular to a magnetic field of 0.570T pointing up. Through the course of 0.180s, the field is changed to one of 0.300T pointing down. What is the average induced emf in the coil? Initially oriented so that its plane is perpendicular to a magnetic field of 0.510T pointing up. Throughout the course of 0.180 s, the field is changed to one of 0.250T pointing down. What is the average induced emf in the coil?

Q2. A professor's office door is 0.9 wide, 2.0 high, and 4 thick; has a mass of 25; and pivots on frictionless hinges. A "door closer" is attached to door and top of the door frame.

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