An object stands on the central axis of a spherical mirror. the object distance is 15.0 cm, the type of mirror is concave, and the magnitude of the focal length is 10.0 cm. (a) sketch a ray-tracing diagram depicting the size and location of the image. calculate (b) the image distance and (c) the magnification. (d) is this image real or virtual?

You have two photos of a person walking. one shows the person at the corner of third and main streets, the other shows the person at the corner of tenth and main streets. there are lampposts at every corner in this town, and the first picture shows it to be 10: 32: 00 exactly. the second picture shows it to be 10: 49: 30. you know three facts: (1) all of the clocks are synchronized; (2) there are exactly 12 equal-sized blocks per kilometer in this town; and (3) the streets that cross main in this area are numbered consecutively, with no interruptions. what is the person’s average speed in kilometers per hour?