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What is the difference between a perpendicular bisector and a median? Say we didn"t need air and it never existed, what would we use for air conditioners? In ΔDEF, d = 53 cm, ∠E=154° and ∠F=5°. Find the length of e, to the nearest 10th of a centimeter.? Calculate the freezing and boiling temperature of a 0.5 molal sodium chloride solution? What is the magnitude of a point charge whose electric field 32 cm away has the magnitude 2.5 N/C?