Acircular loop of flexible iron wire has an initial circumference of 165.0 cm, but its circumference is decreasing at a constant rate of 12.0 cm> s due to a tangential pull on the wire. the loop is in a constant, uniform magnetic field ori- ented perpendicular to the plane of the loop and with magnitude 0.500 t. (a) find the emf induced in the loop at the instant when 9.0 s have passed. (b) find the direction of the induced current in the loop as viewed looking along the direction of the magnetic field.
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One day, after pulling down your window shade, you notice that sunlight is passing through a pinhole in the shade and making a small patch of light on the far wall. you see that the patch of light seems to be a circular diffraction pattern. it appears that the central maximum is about 1 cm across and you estimate that the distance from the window shade to the wall is about 3 m. what is (a) the average wavelength of sunlight? (b) the diameter of the pinhole?
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In addition to gravity, what is the other predominant force that affects the motion of a pendulum?
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Acircular loop of flexible iron wire has an initial circumference of 165.0 cm, but its circumference...
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