Q. A dentist uses a small mirror of radius 52 mm to locate a cavity in a patient's tooth. If the mirror is concave and is held 13 mm from the tooth, what is the magnification of the resulting image?
Q. A chair of weight 70 lies atop a horizontal floor; the floor is not frictionless. You push on the chair with a force of = 37.0 directed at an angle of 42 below the horizontal and the chair slides along the floor.