Complete the diagram to show the position of the object formed by a convex mirror.

10. State the meaning of the term frequency. Frequency is the number of complete oscillations or cycles made by a wave or vibrating object per unit time. It is measured in Hertz (Hz). 11. Repulsion is the surest test of the polarity of a magnet. Explain this observation. Step 1: Understand magnetic attraction. Magnetic attraction occurs between opposite poles of two magnets (North and South) and also between a magnet and an unmagnetized ferromagnetic material (like iron or steel). Step 2: Understand magnetic repulsion. Magnetic repulsion, however, only occurs between like poles of two magnets (North and North, or South and South). Step 3: Conclude why repulsion is the surest test. If an object is attracted to a magnet, it could be either another magnet or a ferromagnetic material. But if an object repels a known magnet, it must definitively be a magnet itself, and its polarity can be determined by the pole of the known magnet causing the repulsion. 12. State one defect of a simple cell. One defect of a simple cell is polarization. This occurs when hydrogen gas bubbles form around the positive electrode (copper), increasing the cell's internal resistance and reducing the current it can supply. 13. The diagram below shows the image formed by a convex mirror. Complete the diagram to show the position of the object. Step 1: Locate the focal point (F) and center of curvature (C). The incident ray shown is parallel to the principal axis. For a convex mirror, the reflected ray's virtual extension passes through the focal point (F). Extend the reflected ray backward to intersect the principal axis; this point is F. The center of curvature (C) is located at twice the focal length from the mirror, on the same side as F. Step 2: Trace a ray from the top of the image (I) through C. Draw a straight line from the top of the image (I) through the center of curvature (C) and extend it to the left, past the mirror. This line represents