The left end of a long glass rod 7.00 cmcm in diameter has a convex hemispherical surface 3.50 cmcm in radius. The refractive index of the glass is 1.60. The glass rod is immersed in oil (nn = 1.45). An object placed to the left of the rod on the rod's axis is to be imaged 1.15 mm inside the rod.
How far from the left end of the rod must the object be located to form the image?

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Greg drew a diagram to compare two of the fundamental forces. which labels belong in the areas marked x, y and z? gravitational force electromagnetic force x. attractive y repulsive z: infinite range x: infinite range y attractive z. repulsive x. always attractive y: infinite range z: attractive or repulsive x. attractive or repulsive y infinite range z: always attractive

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?