The 80-cm-tall, 65-cm-wide tank shown in FIGURE P34.49 is completely filled with water. The tank has marks every 10 cm along one wall, and the 0 cm mark is barely submerged. As you stand beside the opposite wall, your eye is level with the top of the water.

a. Can you see the marks from the top of the tank (the 0 cm mark) going down, or from the bottom of the tank (the 80 cm mark) coming up? Explain.b. Which is the lowest or highest mark, depending on your answer to part a, that you can see?

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Observation point Depth (cm) 10 20 30 40 50 60 70 80 65 cm FIGURE P34.49