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Explain in physical terms how a microwave oven works. what would happen when you put a conductor in the microwave oven? explain.

Arunner is training for an upcoming marathon by running around a 100-m-diameter circular track at constant speed. let a coordinate system have its origin at the center of the circle with the x-axis pointing east and the y-axis north. the runner starts at (x, y) = (50 m, 0 m) and runs 2.5 times around the track in a clockwise direction.

What structural formula represents 4 electrons shared between two atoms?