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Q. Two carts with masses of 12.5 kg and 4.5 kg, respectively, move in opposite directions on a frictionless horizontal track with speeds of 8.0 m/s and 5.0 m/s, respectively. The carts stick together after colliding head-on. Find the final speed of the two carts.

Q. An object 12 cm tall is placed 48 cm from a plane mirror. (a) Draw the ray diagram and obtain the image. (b) What is the distance between the object and the image? (c) Is the image upright or inverted? Real or virtual? Enlarged, diminished or the same size as the object?

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